The digitally controlled KPM163xQx is designed to monitor the insulation level between a non-grounded (IT) AC mains and its protective earth in systems with frequency converters . The unit is for land, marine and offshore use.

An AC or DC auxiliary voltage is required for the unit, if powered from a separate source the network can also be monitored during inactive (standby) conditions. Only ONE KPM163xQx can be connected to each IT-system.

The ohmmeter and the triple-zone status LEDs give at a glance the clear safety message:

• ALARM
• WARNING
• HEALTHY

IDV MEASURING PRINCIPLE
Insulation is measured between the complete galvanically interconnected AC network and its protective earth.

The unit injects a DC measuring signal into the monitored system. The signal flows to ground via the path of the insulation fault, the level of flow indicates the insulation resistance. The measuring accuracy is not influenced by any normal kind of load attached to the AC network.

This unit is used for any land, marine or offshore installations. Start of monitoring function is delayed when auxiliary power is switched on (default 10 secs delay). The unit has minimum of 9 seconds detection time for any insulation fault.

Trip levels and delays are settable on unit rear. A trip LED flashes when the trip level is passed, the relay trips when the delay has elapsed. The timer resets if the fault is removed during countdown.
When auxiliary power is OFF the unit input is automatically protected against "megger" test voltages up to 1.4kVDC, and incorrect measurements caused by the unit’s input impedance are avoided.

OUTPUTS The KPM163FQx has an isolated analogue output proportional to meter reading. If output is used for remote meter reading, we recommend 0-1mA for the slave indicator.

SAFETY
When a voltage adapter (CHx or ANx) is used the signal to terminals 4 and 6 on KPM163xQx is limited to a safe level, avoiding any dangerous voltage exposure to personnel.

The KPM163xQx range is designed to comply with specification IMCA D 045 "Code of Practice for the Safe Use of Electricity Under Water" issued by IMCA.

The unit meets EN 61010-1 Cat. III, Pollution degree 2 and the relevant environmental and EMC tests specified in EN 61326-2-4 to comply with the requirements of the major Classification Societies.

High Voltage Adaptor
Voltage Adaptors CHx and ANx series are used for Insulation Guard KPM163xQx when the monitored line voltage is higher than 690VAC.

INTELLIGENT SETTING ASSISTANCE
KPM163xQx has a built-in Assistance tool for setting/verification of the trip levels and the analogue output.
 
When either the Warning or Alarm potmeter on the rear is operated by user, the meter goes into Assistance Mode and meter reading and analogue output will reflect the potmeter setting.

Reset / Parallelling Disable Function
KPM163xQx has a built-in disable function. When connecting two or more IT-networks together only one unit can be active, the other(s) must be disabled. When unit is disabled the power led will flash every 2 seconds to indicate that unit is inactive.

This unit is used for industrial, marine and offshore installations with frequency converters. Start of monitoring function is delayed when auxiliary power is switched on (default 5 secs delay).

The unit has a detection time of 6-9 seconds for any insulation fault.