IMM 8001/8002 – Digital Motor Protection Relay
ICE / CEE
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IMU307-1 GB Ind. B
86
5.15. OVER VOLTAGE PROTECTION [59]
Function
Voltage rises are detected by the IMM 8000 relays by means of a over voltage unit [59] with 2 levels (1 low-set
level + 1 high-set level) permanently monitoring the voltage (motor operating or stopped, during and after start).
Main characteristics
Low-set level U>
70 - 150 % Un steps of 1 % Un
Low-set time-delay tU>
0.1s to 100s steps of 0.1 s
High-set level U>>
70 - 150 % Un steps of 1 % Un
High-set time-delay tU>>
0.1s to 100s steps of 0.1 s