KCM163x Series
 
 KCM163x - INSULATION GUARD FOR NON-GROUNDED AC NETWORKS
  • Direct connection up to 690V line voltage, up to 6,6kV with HV adapter
  • Monitoring during both live and standby conditions
  • For use in land, marine, offshore, sub-sea and ocean floor Installations
  • Triple-zone insulation monitoring
  • Comply with AODC 035 Code of Practice
  • "Megger" - safe to 1,4kVDC when aux power is OFF
  • Immune to earth capacitance and voltage surges
  • Analogue output proportional to meter reading (F-version)
  • Optional slave indicator
Application
The digitally controlled KCM163x series monitors insulation level between a non-grounded (IT) AC mains and its protective earth, regardless of whether the mains is live or non-live (standby). The unit is for land, marine, offshore, sub-sea and ocean floor 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 standby conditions. Only ONE KCM163x 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
General
IDV MEASURING PRINCIPLE
Insulation is measured between the complete galvanically interconnected AC network and its protective earth.

The unit injects a sequentially coded 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.

Trip levels and delays are settable on unit front. 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.

MEGGER SAFE
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
All F versions have an isolated analogue output proportional to insulation level. 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 KCM163x is limited to a safe level, avoiding any dangerous voltage exposure to personnel.
 
The KCM163x range is designed to comply with specification AODC035 "Code of Practice for the Safe Use of Electricity Under Water" issued by IMCA.

NOTE
Special versions of the KCM163x are available as:

KCM163xM series

Insulation guard with DC detection function, protected against high-energy DC voltage imposed on the monitored AC supply.
 
KCM263x series
Insulation Guards with measuring loop continuity monitoring.
 
INTELLIGENT SETTING ASSISTANCE
KCM163x 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 front is operated by user, the slave meter goes into Assistance Mode and meter reading and analogue output will reflect the potmeter setting.
 
Reset / Parallelling Disable Function
KCM163x has a built-in disable function (available only when DC Aux. Supply is applied). 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.

KCM163E & KCM163F - KCM163G & KCM163GF
Scale range: 0-10MΩ - ∞ (>60MΩ)
This unit is used for marine, ROV and offshore installations. Start of monitoring function is delayed when auxiliary power is switched on (default 10 secs delay). The unit has minimum 150 mS detection time for any insulation fault.
(Recommended for thruster standby monitoring)

Direct connection up to 690V line voltage.
Up to 6,6kV via HV adaptor CH163x or AN6,6 series.
 
KCM163E2 & KCM163F2 - KCM163G2 & KCM163GF2
Scale range: 0-10MΩ - ∞ (>60MΩ)
This unit is used for marine, ROV and offshore installations. Start of monitoring function is delayed when auxiliary power is switched on (default 10 secs delay). The unit has minimum 150 mS detection time for any insulation fault.
(Recommended for thruster standby monitoring)


Direct connection up to 690V line voltage.
Up to 6,6kV via HV adaptor CH163x or AN6,6 series.

KCM163H & KCM163HF - KCM163HG & KCM163HGF
Scale range: 0-10MΩ -(>60MΩ) 
This unit is specifically designed for sub-sea monitoring and includes the advanced Load Distortion and Earth-capacitance Detector (LDED).
 
The LDED function differentiates between a true (resistive) or a false (capacitive) drop in insulation reading, and will maintain reliable and accurate insulation monitoring even if load switching or a major change in load spread capacitance cause meter indication to drop below set relay trip levels.
 
This situation may occur due to the latent high RC product at the high end part of the measuring range. The LDED will then momentarily inhibit all monitoring functions, freeze operation of meter, lamp display, alarm relays and analogue output for duration of a monitoring irregularity.

The unit will restore normal operation at the moment meter deflection rises above set alarm trip levels. The LDED function has minimum 1 secs detection time for any insulation fault.
 
Direct connection up to 690V line voltage.
Up to 6,6kV via HV adaptor CH163x or AN6,6 series.

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