F F DMA-3 CT Current Intensity Indicator User Guide

F F DMA-3 CT Current Intensity Indicator

Specifications

• Model: DMA-3 CT
• Manufacturer: F&F Filipowski L.P.
• Address : Konstantynowska 79/81, 95-200 Pabianice, POLAND
• Phone/Fax: (+48 42) 215 23 83 / (+48 42) 227 09 71
• Website : www.fif.com.pl
• Email : biuro@fif.com.pl
• Purpose : 3-phase current intensity indicator
• Measurement Method: Indirect measurement using current transformers
• Output Current of Current Transformers: 5 A
• Mounting : Suitable for mounting on a 35 mm DIN rail

F &F Filipowski L.P.
Konstantynowska 79/81, 95-200 Pabianice, POLAND phone/fax (+48 42) 215 23 83 / (+48 42) 227 09 71 www.fif.com.pl; e-mail: biuro@fif.com.pl

• Do not dispose of this device in the trash along with other waste! According to the Law on Waste, electro coming from households free of charge and can give any amount to up to that end point of collec?on, as well as to store the occasion of the purchase of new equipment (in accordance with the principle of old-for-new, regardless of brand). Electro thrown in the trash or abandoned in nature, pose a threat to the environment and human health.

Purpose

• The DMA-3 CT is a 3-phase current intensity indicator, adapted for measurement in an indirect circuit using current transformers with an output current of 5 A.

Functioning

• The indicator continuously measures the RMS current value, the result of which is shown on a 3-row, 3-digit segment display on the facade of the unit.
• The indicator allows the value of connected current transformers to be set, so that the value shown on the display corresponds to the actual current value.
• The DMA-3 CT is suitable for mounting in a switchgear directly on a 35 mm DIN rail.

Front description

1. L1 phase LCD display
2. L2 phase LCD display
3. 3 phase LCD display
4. SET button

Mounting

1. Switch off power supply.
2. Install indicator on DIN rail.
3. Connect the indicator according to the connection diagram:
4.  Connect the power supply of the indicator (230 V AC) to termi-nals 5 and 6; connect the current transformer output to termi-nals 1-7 (phase L1), 2-8 (phase L2), 3-9 (phase L3).
5.  Switch on the power supply

• If the secondary windings of the measuring transformers are open (e.g. during assembly) and a current flows thro-ugh the measured circuit, a dangerous voltage may be induced at the terminals of the measuring transformer. It is absolutely necessary to protect oneself from such a situation by switching off the power supply of measured circuits or installing additional bridges short-circuiting the secondary side of a measuring transformer.
• The indicator is designed for current measurement using current transformers with a rated output current of 5 A. Current flow through the measuring circuit of the indi-cator of a value higher than 6 A may lead to damage of the indicator.
• For increased safety, it is recommended that one side of the current transformer be earthed as shown in the connection diagram.

Wiring diagram

1. L1 phase – current input (S1 terminal of the transformer)
2. L2 phase – current input (S1 terminal of the transformer)
3. L3 phase – current input (S1 terminal of the transformer)
4. not used
5. power supply 230 V AC (phase wire) power supply 230 V AC (neutral wire)
6. L1 phase – current output (S2 terminal of the transformer)
7. L2 phase – current output (S2 terminal of the transformer)
8. L3 phase – current output (S2 terminal of the transformer)
9. not used
10. not used
11. not used

Configuration

• In order for the indicator to show current values, the cur-rent transformers connected to the indicator must first be programmed.

Current transformer setting

• The DMA-3 CT indicator is adapted for use with the following current transformers with 5A secondary and primary current: 20, 25, 30, 40, 50, 70, 75, 80, 100, 120, 125, 150, 160, 200, 250, 300, 400, 500, 600, 700, 750, 800, 900, 1000 A.

Current ratio programming

1. Press and hold down the SET button located on the facade of the indicator.
2. Release the button after a minimum of 5 seconds.
3. Use successive short presses of the SET button to set the de-sired current ratio value.
4. Confirmation of the change takes place by pressing the SET button for a minimum of 5 seconds.

• The set value of the current ratio is indicated each time on the display of the indicator when the power is swit-ched on.

Technical data

• power supply 165÷265 V AC/DC
• measurement indirect (transformer 5 A)
• number of measurement channels 3
• measured value RMS value AC current
• frequency 45÷55 Hz
• maximum current 6 A
• measurement range 0÷5 A
• maximum momentary overload 20 A/1 s
• indication accuracy 1%
• reading accuracy
• measurement range <100 A 0.1 A
• measurement range ≥100 A 1 A
• display (for 1 phase) 3×LED segment 6×10 mm
• power consumption 4 W
• terminal 2,5 mm² screw terminals (cord)
• 4.0 mm² screw terminals (wire)
• tightening torque 0.5 Nm
• working temperature -25÷50°C
• dimensions 3 modules (52.5 mm)
• mounting on TH-35 rail
• ingress protection IP20

warranty

• F&F products are covered by a 24-month warranty from the date of purchase. The warranty is only valid with proof of purchase. Contact your dealer or contact us directly.

CE declaration

• F&F Filipowski sp. L.P. declares that the device is in conformity with the essential requirements of The Low Voltage Directive (LVD) 2014/35/EU and the Electromagnetic Compatibility (EMC) Directive 2014/30/UE.
• The CE Declaration of Conformity, along with the references to the standards in relation to which conformity is declared, can be found www.fif.com.pl on the product subpage.

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