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1-phase current control relays with integrated current transformer – RM17JC
The control relay RM17JC00MW is designed to monitor ∿ currents
These control relays allow:
- Integrated current transformer
- Measurement range 2…20 A
- Choice of action on the output relay
- Clip-on mounting on a ⍽ rail
They feature a control status indicator LED.
Applications
- Load state control of motors and generators
- Control of current drawn by a 3-phase motor
- Monitoring of heating or lighting circuits
- Control of pump draining (undercurrent)
- Control of overtorque (crushers)
- Monitoring of electromagnetic brakes or clutches
Description
1. Overcurrent setting potentiometer
2. Spring for clip-on mounting on 35 mm/1.38 in. ⍽ rail
Operating Principles
RM17JC00MW
Control relay RM17JC00MW is:
- equipped with an integrated current transformer
- fault signaling is by LED
An adjustable time delay on threshold crossing, provides immunity to transients, and helps prevent spurious triggering of the output relay
Overcurrent detection
- Relay RM17JC00MW controls overcurrent.
- The relay closes when the current exceeds the threshold setting on the front panel and opens when it drops below the threshold minus the hysteresis.
- When terminal Y1 is linked to A1 (+), the output is reversed. The relay opens when the current exceeds the threshold setting on the front panel and closes again when it drops below the hysteresis value.
1-phase current control relays – RM22JA and RM35JA
RM22JA and RM35JA
These control relays enable:
- Automatic ⎓ or ∿ recognition
- Selection between overcurrent and undercurrent
- Measurement as a true rms value
- Selectable memory function
- Clip-on mounting on a ⍽ rail
They feature:
- Dial pointer LED indicator for relay power ON status
- Relay output status LED
- A sealable cover to help protect the settings
- A control status indicator LED
Applications
- Excitation control of DC machines
- Load state control of motors and generators
- Control of current drawn by a 3-phase motor
- Monitoring of heating or lighting circuits
- Control of pump draining (undercurrent)
- Control of overtorque (crushers)
- Monitoring of electromagnetic brakes or clutches
Description
1. Configuration: selection of operating mode e <I (undercurrent), >I (overcurrent), >I> (overcurrent and undercurrent), MEMORY – NO MEMORY (with or without memory)
2. Current threshold setting potentiometer I%
3a. Hysteresis adjustment potentiometer Hys
3b. Hysteresis/overcurrent and undercurrent window mode adjustment potentiometer Hys/>I>
4. Time delay adjustment potentiometer Tt
5. Diagnostic button
6. Overcurrent setting potentiometer >I
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