Ziehl-Abegg U-EK230E Releasing Unit For Motors with Temperature Sensors TP Thermistors Instruction Manual

Ziehl-Abegg U-EK230E Releasing Unit For Motors with Temperature Sensors

TP Thermistors

Product Information

• Product Name: Type U-EK230E
• Part Number: 382008
• Application: Releasing unit for motors with temperature sensors TP (thermistors)

Features:

• Alarm indicator (red)
• ON indicator (green)
• Reset button (blue)
• No pre-adjustment settings required
• Tripping temperature determined by response temperature of connected thermistors
• Allowed usage in explosive atmospheres with 3 or 6 thermistors in series
• Automatic switch-on after supply voltage dip
• Manual and remote reset options
• Important safety precautions and voltage warnings
• Installation and commissioning instructions
• Troubleshooting guidelines
• Technical specifications

Product Usage Instructions

Pre-Adjustment:
No settings need to be made. The tripping temperature is determined solely by the response temperature of the connected thermistors. Depending on the number of thermistors, the following tripping temperatures and reset temperatures arise related to TNF (detector operating temperature):

Installation:
When installing the device into the switchgear cabinet, please observe the maximum permissible temperature. Ensure sufficient clearance to other devices or sources of heat and enough forced draught for cooling. If cooling is made more difficult, e.g., due to close devices with increased surface temperature or limited airflow cooling, the permissible ambient temperature reduces.

Commissioning: Before switching on the mains voltage, make sure that it matches the specification on the type plate. Observe the safe separation
guidelines mentioned in Chapter 15.8.

Operation:
The device must be manually reset after a fault signal (red = alarm). This can be done using the built-in reset button or an external button (remote reset terminals Y1, Y2).

Troubleshooting and Remedies:
In case of a fault signal, the alarm indicator (red) will change to green after a reset. Alternatively, a reset can be done by closing an external contact at terminals Y1, Y2 or with voltage recovery. If any other malfunctions occur, please replace the device and provide a description of the malfunction when sending it back for repair.

Technical Data:
Refer to the product manual for detailed technical specifications regarding power supply, PTC thermistor, and terminal voltage.

General Notes

• Compliance with the following instructions is mandatory to ensure the functionality and safety of the product. If the following instructions given especially but not limited for general safety, transport, storage, mounting, operating conditions, start-up, maintenance, repair, cleaning and disposal / recycling are not observed, the product may not operate safely and may cause a hazard to the life and limb of users and third parties.
• Deviations from the following requirements may therefore lead both to the loss of the statutory material defect liability rights and to the liability of the buyer for the product that has become unsafe due to the deviation from the specifications.

Display- and control elements

1. Alarm (red)
2. ON (green)
3. Reset button (blue)

Pre-Adjustment

• No settings have to be made. The tripping temperature is determined solely by the response temperature of the connected thermistors.
• Depending on the number of thermistors the following tripping temperatures and reset temperatures arise related to TNF (detector operating temperature):

| Only 3 or 6 thermistors in series are allowed for usage in explosive atmospheres.
---|---
| Tripping temperature| Reset temperature
1 thermistor| TNF + 15 K| TNF + 5 K
3 thermistors in series| TNF + 5 K| TNF – 5 K
6 thermistors in series| TNF| TNF – 20 K

Application and brief description
The device protects electrical equipment against excessive warming and thermal overload. Used in combination with respective thermistors tripping temperatures from 60 °C up to 180 °C can be realized. The device is conform to EN 60947-8. Thermistors according to DIN VDE V 0898-1-401 (ATEX) or equivalent detail specification (UKEX) shall be connected. The thermistors are suitable for installation into windings of electrical machines or transformers, bearings and heatsinks as well as to monitor the temperature of liquid media, airflow and gases. With ATEX approval, equipment in explosive gas atmospheres Zone 1 and 2 (marking G: gas) or in areas with combustible dust Zone 21 and 22 (marking D: dust) can be protected. All functions of the device serve to protect non-explosive-protected equipment and explosive-protected equipment in regular operation and in case of failure.

Summary of features

• 1 thermistor circuit for 1 (not allowed for explosive atmospheres), 3 or 6 PTC thermistors “TP”.
• Short-circuit detection within the thermistor circuit.
• Output relay with 1 change-over contact (co).
• Operating status display.

A current monitors continuously the resistance of the thermistor circuit. In cold state, the resistance is ≤ 250 Ω per thermistor (thermistor circuit ≤ 1.5 kΩ). The device is switched on and relay contacts 11, 14 are closed. The resistance of the thermistors rises rapidly at detector operating temperature TNF. The device switches off at a resistance of 3…4 kΩ and the relay contacts 11, 12 close. The device also switches off in the case of detector or line short-circuit (< approx. 20 Ω) or detector or line interruption. The device remains switched off until the build in or an external reset button is pushed. Power-on is recognized as reset. With bridged terminals Y1, Y2, the reclosing lock function is disabled.

Connecting diagram

Function diagram

Caution! The device switches on automatically after a supply voltage dip.

Inputs (Y1/Y2) bridged

With a bridge at the reset input (Y1/Y2) the reclosing lock is out of operation. The device switches back automatically, when the temperature of the thermistor circuit has fallen below the switchback value.

Important notes

**| Attention!
Observe safety rules and standards. Notice safety remarks!
---|---
|
**| Attention! Hazardous voltage!

• May cause electric shock and burns.
• Before commencing work on the system, the power must be disconnected.

Installation

• The applicant must observe safety rules and standards.
• The device can be mounted on 35 mm rail according EN 60715 or with screws M4 (Option).
• Design V2, width 35 mm (2 M).
• The device must be installed in an enclosure of class IP 5X or better.
• Terminals maximum tightening torque 0.5 Nm.

When installing the device into the switchgear cabinet, please observe the max. permissible temperature. Care for both, sufficient clearance to other devices or sources of heat or enough forced draught. If cooling is made more difficult, e.g. close devices with increased surface temperature or by handicap of airflow cooling, the permissible ambient temperature reduces.

Commissioning

****| Before switching on the mains voltage make sure that it matches the specification on the type plate.
---|---
|
**| Attention!
Observe chapter 15.8 Safe separation .**

• After the supply voltage is switched on and when the thermistors are correctly connected the green LED „ON“ must light-up and the relay contacts 11, 14 must close.
• The correct function of the device must be checked by resistance simulation at terminals T1, T2 according to chapter 16 Proof testing of the safety functions. This check must be repeated after changes to the installation.

Operation instructions
The device must be manually reset after a fault signal (red = alarm). For this purpose, the built-in reset button or an external button (remote reset terminals Y1, Y2) can be used.

Troubleshooting and remedies

Relay contacts 11, 14 do not close:

• Check the supply voltage Us at terminals A1, A2 (green LED lights-up).
• Check the thermistors at terminals T1, T2. In case of a fault the red LED lights-up.
• The resistance of the thermistor circuit must be 50 Ω < R < 1500 Ω. The terminal voltage T1, T2 must be < 2.5 VDC with connected thermistors and temperature below TNF.
• Push the button “Reset”. A fault signal can be reset at R < 1.65 kΩ. The status LED changes from red to green. Alternatively, a reset can be done with closing an external contact at terminals Y1, Y2 or with voltage recovery.

Relay contacts 11, 14 do not open:

• With no connection at terminals T1, T2 the device must indicate a fault and the relay contacts 11, 14 must open. The terminal voltage T1, T2 must be approximately 8 VDC.
• In case of any other malfunctions, replace the device. Please add a description of the occurred malfunction when sending it back for repair.

Technical data

 Power supply (A1, A2)|
---|---
Power supply Us| AC 220-240 V
Voltage tolerance| AC 0.9 Us …1.1 Us
Frequency| 50 / 60 Hz
Frequency tolerance| 45 Hz … 65 Hz
Power consumption| < 2 W
Voltage dip buffer time| max. 20 ms
 PTC thermistor “TP” input (T1, T2)| according to DIN VDE V 0898-1-401
Number| 1 (not allowed for explosive atmospheres) 3 or 6 in series
Rated response temperature TFS| 60 °C … 180 °C
Response tolerance| ±6 °C
Collective resistance cold thermistor| ≤ 1.65 kΩ
Terminal voltage (thermistor)| ≤ 2.5 VDC at R ≤ 3.65 kΩ, ≤ 2 V at R ≤ 1.65 kΩ
Open-circuit voltage| ≤ 9 VDC at R = ¥
Terminal current (thermistor)| ≤ 1 mA
Power / Load| ≤ 2 mW
---|---
Line capacity max.| 0.2 µF
Temperature monitor cut-out-point| 3.3 kΩ …3.65 kΩ …3.85 kΩ
Temperature monitor reclosing point| 1.7 kΩ …1.8 kΩ …1.95 kΩ
Short circuit monitor cut-out-point| ≤ 20 Ω
Short circuit monitor reclosing point| ≤ 40 Ω
Reset input (Y1, Y2)| Potential free contact (no)
Current| 1 mA
Voltage| < 30 VDC
Relay output (11, 12, 14)| EN 60947-5-1
Contacts| 1 change-over contact (co)
Switching voltage| max. AC 400 V
Switch-on current (NO)| AC 15 A 4s 10% ED
min. voltage / current| 12 V 10 mA
Conventional thermal current Ith| max. 5 A
Switching power max. AC cos φ = 1| 2000 VA
Switching power max. DC (ohm)| 0.25 A 300 V; 0.35 A 150 V; 1 A 60 V; 8 A 30 V
Contact life electrical cos φ = 1| 2 x 105 operating cycles at 250 V / 2 A
| 1 x 105 operating cycles at 250 V / 5 A
Contact life mechanical| 3 x 107 operating cycles
Recommended fuse (NO)| 4 A time-lag or miniature circuit-breaker MCB B4
Recommended fuse (NC)| 3.15 A time-lag
Utilization category Rated operational current Rated operational voltage| AC-15 Ie = 3 A Ue = 250 V
DC-13 Ie = 2 A Ue = 24 V
DC-13 Ie = 0.4 A Ue = 120 V
DC-13 Ie = 0.2 A Ue = 250 V
UL electrical ratings| 250 VAC, 3 A, general use
| C300
Test conditions| IEC/EN 60947-8
Rated impulse voltage| 4000 V
Overvoltage category| III
Pollution degree| 2
Rated insulation voltage Ui| 320 V
Transformer| EN 61558-2-6 (VDE 0570)
Proof Test Voltage| 2500 VAC 50 Hz
EMC – Immunity| EN 61000-6-2
EMC – Emission| N.a., fmainosc < 9 kHz
On-period| 100 %
Ambient conditions|
Fitting position| any
Rated ambient temperature| -20 °C … +55 °C
Rated storage Temperature| -20 °C …+70 °C (1K21 EN 60721-3-1)
Altitude| ≤ 2000 m above sea level.
Climatic conditions| 5-85 % rel. F., no condensation (3K22 EN60721-3-3)
Vibration DIN EN 60068-2-6| 2…25 Hz ±1.6 mm  25 … 150 Hz 5 g
Vibration DIN EN 60947-8| 2 … 13.2 Hz ± 1 mm  13.2 … 100 Hz ± 0.7 g
Shock DIN EN 60947-8| half sine, 10 g, 11 ms
Housing| Design V2
Dimensions (W x H x D) mm| 35 x 90 x 58 mm
Width| 2 M
Plastic material| PA66
Fire protection class| UL 94 V-2
Protection class housing EN 60529| IP30
Mounting EN 60715| Snap mounting on 35 mm standard rail EN60715
Optional: Screw mounting| M4 screws (additional bar not included)
Weight| approx. 117 g
Terminal connection| Screw mounting M3
Protection class terminals EN 60529| IP20
Tightening torque| 0.5 Nm
Line connection solid wire| 1 x 0.5…. 2.5 mm2 (AWG 22 – 14)
---|---
Stranded wire with insulated ferrules| 1 x 0.14 …1.5 mm2 (AWG 28 – 16)
Insulation strip length min| 8 mm
Subject to technical modifications|

Dimensions – Design V2 Dimensions in mm

1. Top piece
2. Bottom piece
3. Mounting bar
4. Seal mounting link
5. Front plate element
6. Marking for bottom
7. Extensible bolt for wall fastening with screws. Bolt bore Ø 4.2 mm

Safety instructions and references for putting into operation

Attention! Safety Instructions and references please read carefully!

Explosive atmospheres

• The increased danger within explosive atmospheres (gas or dust) requires the careful attention of the safety instructions and references for putting into operation. Observe the national safety rules and regulations for prevention of accidents as well as the standard EN 60079-14 / VDE 0165-1. All work for the connection, for putting into operation and maintenance is to be implemented by qualified, responsible technical personnel. Inappropriate behaviour can cause heavy personal damage and damages to property.
• The response of the device must directly switch off the motor, also when used together with inverters. This must be implemented with circuitry.

Special remarks for explosive gas atmospheres areas (Zone 0, 1 and 2)
The device must be installed outside potentially explosive gas atmospheres unless the device is protected by a suitable ignition protection type (for example a flameproof enclosure).

Special remarks for use in the presence of combustible dust (Zone 20, 21 and 22)
The device must be installed outside potentially explosive dust atmospheres unless the device is protected by a suitable enclosure for dust atmospheres.

Safety characteristics of the safety device (EN 50495 / VDE 0170-18)
Safety Integrity Level (EN 61508) and safety related parameters

Observe proof test interval according EN 60079-17 for electrical equipment ≤ 3 years.

Category and Performance-Level (EN ISO 13849-1)

• The device fulfils the requirements of category 1 and PL = c. MTTFd = 100 years.
• The data of the functional safety stated above are valid for an ambient temperature of 40 °C. Data for additional ambient temperatures can be obtained on request.

Application of the safety device used with equipment category (EN 50495 / VDE 0170-18)
This standard describes the minimum requirements of safety integrity level and fault tolerance of a safety device in the application together with the category of the Equipment Ander Control (EUC).

Zone 20
Category 3 (3G, 3D) EPL = Gc, Dc| Zone 2, Zone 22| Zone 1, Zone 21| Zone 0, Zone 20

The device thus is suitable as safety device for Equipment Under Control (EUC) with HFT = 0 category 3 in Zone 1 and Zone 21. The combined equipment shall comply with the relevant standards EN 60079-0 according to the categories to match.

Wiring

• The lines of the thermistor circuit must be routed as separate control lines as far as to the motor terminal block. Using lines of the supply cable or other mains voltage lines is not permissible. If extreme inductive or capacitive stray effects are to be expected by parallel cables of the power installation, shielded control lines should be used.
• If the motor / fan is used with an electronic speed regulation, it must be guaranteed that coupling to the thermistor lines will not trigger a false alarm or prevent the device from triggering a correct stop function.
• ZIEHL-ABEGG motors with fixed connecting cable
• ZIEHL-ABEGG asynchronous motors MK085, MK106 and MK137 series and fans using these motors come with a fixed connecting cable including both thermistor lines and supply lines. Monitoring these motors / fans with a fixed connecting cable up to a maximum of 205 cm in length is allowed.

Attention!
Extending the connecting cable is not allowed!

• The terminals Y1, Y2 may be attached parallel to a common reset mechanism. Thermistor lines must not be connected.
• The line resistance within the thermistor circuit must not exceed a value of 20 Ω to ensure short circuit detection.
• Maximum permissible length for thermistor circuit lines:

• With commissioning and after modification of the plant the thermistor resistance must be checked with a suitable measuring instrument. With a resistance < 50 Ω the thermistor circuit is to be examined for short-circuit.

Attention!
Check thermistors only with measuring voltages of < 2.5 V.

Safe separation
Line circuits (A1, A2) and (11, 12, 14) have a safe separation to low-voltage electric circuits (T1, T2) and (Y1, Y2).

Stop function

• A stop function triggered by the device must transfer the machine as fast as possible into a safe state. The stop function must have top priority.
• In case of failure the device switches off the contactor / circuit breaker and prevents an overheating of the isolation system and / or the surface temperature. The protective function of the device is only guaranteed if the wiring is done directly in the control circuit of the motor in accordance with the connection diagram. The contacts must be protected, to prevent welding.

Start and restart
Only if no dangerous condition is present, a reset is allowed. A device with bridged terminals Y1, Y2 (auto reset) switches back on after the thermistors cooled down. This function must not be used in applications where an automatic reset could cause personal injuries or damage to property

Manual reset

• When the device triggers a stop instruction, it must be maintained until the manual reset mechanism is operated and safe conditions for a renewed start are given. The manual reset must be only possible if all safety functions and protection devices are effective.
• The stop instruction remains, until a reset is made by pressing the push-button „Reset“. A start-up is only possible, if no case of failure occurs and the motor is cooled down to a sufficient value of temperature.
• The device switches on automatically with return of supply voltage. The user must guarantee by external interlock (see connection diagram) that the supervised machine does not start again independently.

Attention!
Safety circuits according to EN 60204 / EN 62061. The devices must not be used alone for functions, where an automatic restart must be prevented.

Proof testing of the safety functions

The safety function must be tested at regular intervals. It is recommended to carry out the proof-test once a year. Depending on the zone risk, tests should be conducted more frequently. A fault is recognized by the safety test. A fault between safety tests could cause loss of protection.

The following must be tested additionally to recurring examinations with maintenance services:

• The safety function must be tested by interrupting the thermistor circuit wire at terminals T1, T2.
• The short circuit monitoring function must be tested by bridging the thermistor circuit wires at terminals T1, T2.
• The safety function must be tested by changing the resistance from 50…1500 Ohm to 4000 Ohm at terminals T1, T2.
• The function of the electronic interlock must be tested additionally.
• If an error is detected no restart must be induced until the error is cleared.

Maintenance and repair

• The devices are maintenance free. Only the manufacturer may perform repairs. We recommend testing within the regular maintenance intervals of the plant, where the device is used. EN 60079-17 is to be observed.
• The guarantee presupposes the observance of these operating instructions (safety and start-up instructions).

Disposal / Recycling
Disposal must be carried out professionally and in an environmentally friendly way in accordance with the respective national legal stipulations.

• Separate the materials by type and in an environmentally-friendly way.
• If necessary, commission a specialist company with the waste disposal.

WEEE marking

• Disposal of waste electrical and electronic equipment (applicable in the European Union).
• Equipment affected by this is indicated by the corresponding symbol.
• You can find further information on this on our website.

Manufacturer reference
Our products are manufactured in accordance with the relevant international regulations. If you have any questions concerning the use of our products or plan special uses, please contact:

ZIEHL-ABEGG SE

• Heinz-Ziehl-Straße
• 74653 Künzelsau Deutschland
• Telefon: +49 (0) 7940 16-0 info@ziehl-abegg.de http://www.ziehl-abegg.de

ZIEHL-ABEGG UK Ltd.

• Springfield Business Park Chelmsford, Essex, CM2 5AS United Kingdom
• Fon + 44 1245 449010
• info@ziehl-abegg.co.uk http://www.ziehl-abegg.com

Service information
If you have any technical questions while commissioning or regarding malfunctions, please contact our support department for control systems – ventilation technology.

• phone: +49 (0) 7940 16-800
• Email: fan-controls-service@ziehl-abegg.de
• Our worldwide contacts are available in our subsidiaries for deliveries outside of Germany
• see www.ziehl-abegg.com

EU declaration of conformity

• Manufacturer: ZIEHL-ABEGG SE
• Heinz-Ziehl-StraBe
• 74653 Kunzelsau Germany

The manufacturer is solely responsible for issuance of the declaration of conformity.

The products: U-EK230E (382008)
The above mentioned products of this declaration fulfil all relevant provisions of the following Directives of the Union:

• EMC Directive 2014/30/EU
• Low Voltage Directive 2014/35/EU
• ATEX Directive 2014/34/EU
• RoHS Directives 2011/65/EU & (EU) 2015/863

The following harmonized standards have been applied:

• EN 50495:2010
• EN 60947-8:2003 + A1:2006 + A2:2012
• EN IEC 61000-6-2:2019
• EN IEC 61000-6-3:2021
• EN IEC 63000:2018

Notified body and number of the EU type-examination certificate:

• PTB Physikalisch Technische Bundesanstalt 0102 PTB 03 ATEX 3045 A1
• K0nzelsau, 10.02.2023
• (Location, date of issue)

ZIEHL-ABEGG SE

• Moritz Kramer
• Director Product Development
• Ventilation Technology
• (name, function)

ZIEHL-ABEGG SE

• Ralf Oesselke
• Director Projects & Series Development
• Ventilation Technology
• (name, function)

UK Declaration of Conformity

• Manufacturer: ZIEHL-ABEGG SE
• Heinz-Ziehl-StraBe
• 74653 Kunzelsau Germany

The manufacturer is solely responsible for issuance of the declaration of conformity.
The products: U-EK230E (382008)
These products comply with the following UK directives:

• Electromagnetic Compatibility Regulations 2016 No. 1091
• Electrical Equipment (Safety) Regulations 2016 No. 1101
• Equipment and Protective Systems Intended for use in Potentially Explosive Atmospheres Regulations 2016 No. 1107
• The Restriction of the Use of Certain Hazardous Substances in Electrical and Electronic Equipment Regulations 2012 No. 3032

The following designated standards have been used:

• EN 50495:2010
• EN 60947-8:2003 + A1 :2006 + A2:2012
• EN IEC 61000-6-2:2019
• EN IEC 61000-6-3:2021
• EN IEC 63000:2018

Approved Body and number of the UK-type examination certificate

• Bureau Veritas Consumer Products Services United Kingdom Limited, approved body No. 8507
• EPS 23 UKEX 1011 .
• K0nzelsau, 10.02.2023
• (location, date of issue)

ZIEHL-ABEGG SE

• Moritz Kramer
• Director Product Development
• Ventilation Technology
• (name, function)

ZIEHL-ABEGG SE

• Ralf Oesselke
• Director Projects & Series Development
• Ventilation Technology
• (name, function)

References

• ZIEHL-ABEGG | Ventilatoren & Motoren - leise & energiesparend
• ZIEHL-ABEGG | Industrieventilatoren | Aufzugstechnik
• ZIEHL-ABEGG | Industrieventilatoren | Aufzugstechnik

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