DOLD IL 5880 Insulation Monitor Instructions

DOLD IL 5880 Insulation Monitor Instructions

Installation / Monitoring Technique

Product Description

The insulation monitor IL 5880 of the series VARIMETER IMD monitors the insulation resistance of isolated single phase or 3-phase voltage systems (IT- systems) with nominal voltage up to AC 0 … 500 V. The separate supply voltage (auxiliary voltage) allows also monitoring when the system is without voltage. The device has LEDs to indicate the operating status. The response value can be set in a user-friendly way on the front of the device via a potentiometer.

Circuit Diagram

IL 5880, SL 5880

IP 5880, SP 5880

Connection Terminals

bridged: hysteresis functionLT1/LT2 not bridged: manual reset
11, 12, 1421, 22, 24| Changeover contact(each for switch in position VW or AL)

Your Advantage

• Preventive fire and system protection
• For single and 3-phase AC-systems up to 0 … 500 V and 10 … 10000 Hz
• Monitors also disconnected voltage systems
• Easy adjustment of response values

Features

• According to IEC/EN 61557-8
• Adjustable tripping value RAL of 5 … 100 kΩ or 10 … 500 kΩ
• De-energized on trip
• Auxiliary voltage Measuring Circuit and output contacts are galvanically separated
• Manual and auto reset
• With test and reset button
• Connections of external test and reset buttons possible
• LED indicators for operation and alarm
• 2 changeover contacts
• IL/SL 5880/200 with additional prewarning
  • Adjustable prewarning value 10 kΩ … 5 MΩ
  • Output function programmable
• Variant IL/SL 5880/300 according to DIN VDE 0100-551 for mobile generator sets available
• 4 models available:
  IL 5880, IP 5880:

61 mm deep with terminals near to the bottom to be mounted in consumer units or industrial distribution systems according to DIN 43880
SL 5880, SP 5880: 98 mm deep with terminals near to the top to be mounted in cabinets with mounting plate and cable ducts

• DIN rail or screw mounting
• 35 mm width

Approvals and Markings

Applications

• Monitoring of insulation resistance of ungrounded voltage systems to earth.
• IL/SL 5880/200 can also be used to monitor standby devices for earth fault, e.g. motor windings of devices that have to function in the case of emergency.
• IL/SL 5880/300 according to DIN VDE 0100-551 to monitor mobile generator systems
• Other resistance monitoring applications.
• For industrial and railway applications

Function Diagram

IL 5880, SL 5880, IP 5880, SP 5880

IL 5880/200, SL 5880/200, IP 5880/200, SP 5880/200

Function

The device is connected to the supply via terminals A1-A2. The unit can either be supplied from the monitored voltage system or from an separate auxiliary supply. Terminal L is connected to the monitored voltage and PE to earth. If the insulation resistance RE drops below the adjusted alarm value RAL the red LED goes on and the output relay switches off (de-energized on trip). If the unit is on auto reset (bridge between LT1- LT2) and the insulation resistance gets better (RE rises), the insulation monitor switches on again with a certain hysteresis and the red LED goes off. Without the bridge between LT1-LT2 the Insulation monitor remains in faulty state even if the insulation resistance is back to normal. (In order to achieve failure storage, the voltage system showing a fault must not be switched off too fast after detection of the failure, see notes). The reset is done by pressing the internal or external reset button or by disconnecting the auxiliary supply. By activating the “Test” button an insulation failure can be simulated to test the function of the unit.
The variants IL/SL 5880.12/200 have a second setting range with a higher resistance up to 5 MΩ (Potentiometer RVW). This setting value can be used for pre-warning with relay output, by positioning the lower setting switch to “AL 11-12-14; VW 21-22-24”.
If the higher setting range should be used only, the setting switch is put in position “VW 2u” and both contacts react only to the higher setting.
If the lower setting range should be used only, the setting switch is put in position “AL 2u” and both contacts react only to the lower setting.
When set to manual reset the latching is active on both settings RAL and RVW. Therefore it is possible in the case of a short insulation decrease (Switch position AL 11-12-14; VW 21-22-24), to pass the warning signal to a PLC while the main fault does not lead to a disconnection of the mains via the contacts 11-12-14.

Indicators

Green LED “ON”: On, when supply voltage connected
Red LED “AL”: On, when insulation fault detected, (RE < RAL)
Yellow LED “VW”: On, when insulation resistance is under prewarning value, RE < RVW (only with variant IL/SL 5880.12/2 and /300)

Notes

Risk of electrocution!
Danger to life or risk of serious injuries.

• Disconnect the system and device from the power supply and ensure they remain disconnected during electrical installation.
• The terminals of the control input PT, LT1 und LT2 have no galvanic separation to the measuring circuit L and are electrically connected together, therefore they have to be controlled by volt free contacts or bridge. These contacts ore bridges must provide a sufficient separation depending on the mains voltage on L.
• No external potentials may be connected to external control terminals PT, LT1 und LT2.

Attention!

• Before checking insulation and voltage, disconnect the insulation monitor
  IL/SL 5880 from the power source!

• In one voltage system only one insulation monitor can be used. This has to be observed when interconnecting two separate systems.

• The auxiliary supply can be connected to a separate auxiliary supply or to the monitored voltage system. The range of the auxiliary supply input has to be observed.

Attention!

• The Insulation monitors IL/SL 5880 are designed to monitor AC-voltage systems. Overlayed DC voltage does not damage the instrument but may change the conditions in the measuring circuit.
• Line capacitance CE to ground does not influence the insulation measurement, as the measurement is made with DC-voltage. It is possible that the reaction time in the case of insulation time gets longer corresponding to the time constant RE * CE.
• The model /200 can be used, because of it´s higher setting value, to monitor single or 3-phase loads for ground fault. If the load is operated from a grounded system the insulation resistance of the load can only be monitored when disconnected from the mains. This is normally the fact with loads which are operated seldom or only in the case of emergency but then must be function (see connection example).
• When monitoring 3-phase IT systems it is sufficient to connect the insulation monitor only to one phase. The 3-phases have a low resistive connection (approx. 3 – 5 Ω) via the feeding transformer. So failures that occure in the non-connected phases will also be detected.
• Storing of insulation failures:
  The storing of an insulation failure is delayed slightly longer the reaction of the output relay because of interference immunity.
  In cases where the defective voltage system is switched off immediartely by the output of the insulation monitor it can happen that the fault is not stored (e. g. mobile generator sets).
  For these applications we recommend the variant IL/SL 5880/300, where the output relay reacts only after the fault ist stored. All other features of this variant are simular to IL/SL 5880/200.

Technical Data

Auxiliary Circuit

Nominal voltage UN
IL 5880, SL 5880:
AC 220 … 240 V, AC 380 … 415 V
0.8 … 1.1 UN
DC 12 V, DC 24 V
0.9 … 1.25 U
IP 5880, SP 5880: AC / DC 110 … 240 V
0.7 … 1.25 UN
Frequency range (AC): 45 … 400 Hz
Nominal consumption:
AC: Approx. 2 VA
DC: Approx. 1 W

Measuring Circuit

Nominal voltage UN: AC 0 … 500 V
Voltage range: 0 … 1.1 UN
Frequency range: 10 … 10000 Hz
Alarm value RAL: 5 … 100 kΩ 10 … 500 kΩ
Prewarning value RVW
(only at IL/SL 5880/2 and IL/SL 5880/300): 10 kΩ … 5 MΩ
Setting RAL,RVW: Infinite variable
Internal test resistor: Equivalent to earth resistance of < 5 kΩ
Internal AC resistance: > 250 kΩ
Internal DC resistance: > 250 kΩ
Measuring voltage: Approx. DC 15 V, (internally generated)
Max. measuring current (RE = 0): < 0.1 mA Max. permissible noise
DC voltage: DC 500 V
Operate delay
At RAL = 50 kΩ, CE = 1 µF
RE from ∞ to 0.9 RAL: < 1.3 s
RE from ∞ to 0 kΩ: < 0.7 s
Response inaccuracy: ± 15 % ± 3 kΩ IEC 61557-8
Hysteresis
At RAL = 50 kΩ: Approx. 15 %

Output

Contacts:
IL / SL 5880.12,
IP / SP 5880.12: 2 changeover contacts
IL / SL 5880.12/2 ,
IL / SL 5880.12/300,
IP / SP 5880.12/2 : 2 x 1 changeover contact, programmable
Thermal current Ith: 4
Switching capacity
To AC 15
NO: 5 A / AC 230 V IEC/EN 60947-5-1
NC: 2 A / AC 230 V IEC/EN 60947-5-1
To DC 13: 2 A / DC 24 V IEC/EN 60947-5-1

Electrical life
To AC 15 at 1 A, AC 230 V: ≥ 5 x 105 switching cycles IEC/EN 60947-5-1
Short circuit strength
max. fuse rating: 4 A gG / gL IEC/EN 60947-5-1
Mechanical life: ≥ 30 x 106 switching cycles

Technical Data

General Data

Operating mode: Continuous operation Temperature range
Operation: – 25 … + 60 °C
Storage: – 25 … + 70 °C
Altitude: ≤ 2000 m
Clearance and creepage distances
Rated impulse voltage / pollution degree between auxiliary supply IEC 60664-1 connections (A1- A2): 4 kV / 2 at AC-auxiliary voltage
Between measuring input
connections (L – PE): 6 kV / 2 IEC 60664-1
Between auxiliary supply and measuring input
connections: 6 kV / 2 IEC 60664-1
Auxiliary supply connections and measuring input
to relay contacts: 6 kV / 2 IEC 60664-1
Relay contact 11-12-14 to relay contact 21-22-24: 4 kV / 2 IEC 60664-1
Insulation test voltage
Routine test: AC 4 kV; 1 s AC 2,5 kV; 1 s
EMC
Electrostatic discharge: 8 kV (air) IEC/EN 61000-4-2
HF irradiation
80 MHz … 1 GHz: 10 V / m IEC/EN 61000-4-3
1 GHz … 2.5 GHz: 3 V / m IEC/EN 61000-4-3
2.5 GHz … 2.7 GHz: 1 V / m IEC/EN 61000-4-3
Fast transients: 2 kV IEC/EN 61000-4-4
Surge voltages
Between A1 – A2: 1 kV IEC/EN 61000-4-5
Between L – PE: 2 kV IEC/EN 61000-4-5
HF-wire guided: 10 V IEC/EN 61000-4-6
Interference suppression:
IL / SL 5880: Limit value class B EN 55011
IP / SP 5880: Limit value class A*)
) The device is designed for the usage under industrial conditions (Class A, EN 55011).
When connected to a low voltage public system (Class B, EN 55011) radio interference can be generated. To avoid this, appropriate measures have to be taken.

Degree of protection:
Housing: IP 40 IEC/EN 60529
Terminals: IP 20 IEC/EN 60529
Housing: Thermoplastic with V0 behaviour according to UL Subjekt 94
Vibration resistance: Amplitude 0.35 mm frequency 10 … 55 Hz IEC/EN 60068-2-6
Climate resistance: 25 / 060 / 04 IEC/EN 60068-1
Terminal designation: EN 50005
Wire connection: DIN 46228-1/-2/-3/-4
Cross section: 2 x 2.5 mm2 solid or 2 x 1.5 mm2
stranded wire
Stripping length: 10 mm
Fixing torque: 0.8 Nm
Wire fixing: Flat terminals with self-lifting clamping piece IEC/EN 60999-1
Mounting: DIN rail mounting (IEC/EN 60715) or screw mounting M4, 90 mm hole pattern, with additional clip available as accessory
Weight:
IL 5880: 160 g
SL 5880: 189 g
IP 5880: 250 g
SP 5880: 300 g

Dimensions

Classification to DIN EN 50155 for IL 5880

Vibration and shock resistance: Category 1, Class B IEC/EN 61373
Service temperature classes: OT1 compliant
Protective coating of the PCB: No

Standard Types

IL 5880.12 AC 220 … 240 V
Article number: 0053378

• Auxiliary voltage UH : AC 220 … 240 V

• Adjustable alarm value RAL: 5 … 100 kΩ

• Width: 35 mm SL 5880.12 AC 220 … 240 V
  Article number: 0055396

• Auxiliary voltage UH : AC 220 … 240 V

• Adjustable alarm value RAL: 5 … 100 kΩ

• Width: 35 mm

Variants

IL / SL 5880.12/100: Same as standard type, but alarm value not adjustable, but fixed value
IL / SL 5880.12/200: With pre-warning and programmable outputs
IL / SL 5880.12/201: As version IL / SL 5880.12/200, but both output relays with ergized on Trip principle
IL / SL 5880.12/300: According to DIN VDE 0100-551 as version IL / SL 5880.12/200, but for use with mobile generator sets

Ordering example for variants

Accessories

ET 4086-0-2: Additional clip for screw mounting
Article number: 0046578

Connection Example

Monitoring of an ungrounded voltage system.

1. Auxiliary supply UH (A1 – A2) can be taken from the monitored voltage system. The voltage- and frequency range of the auxiliary supply input must be observed.
2. With bridge LT1 – LT2: Automatic reset without bridge LT1 – LT2: Manual reset, reset with button LT

Monitoring of motorwindings against ground.
The insulation of the motor to ground is monitored as long as contactor K does not activate the load.
*2) With bridge LT1 – LT2: Automatic reset Without bridge LT1 – LT2: Manual reset, reset with button LT

Monitoring of an ungrounded voltage system.

1. Auxiliary supply UH (A1 – A2) can be taken from the monitored voltage system. The voltage- and frequency range of the auxiliary supply input must be observed.
2. With bridge LT1 – LT2: Automatic reset
   Without bridge LT1 – LT2: Manual reset, reset with button LT

E. Dold & Söhne GmbH & Co. KG **D-78120 Furtwangen**

Bregstraße 18 `` **Phone :** +49 7723 654-0 `` **Fax :** +49 7723 654356
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