KPM465x Series
 
KPM465x - INSULATION "MEGGER" FOR INACTIVE ELETRICAL SYSTEMS
  • Non-stop "megging" of AC or DC non-gronded networks, pumps, emergency generators and thrusters during inactive (disconected, idle or standby) conditions
  • For maximum 690V system voltage
  • Triple-zone insulation monitoring, a must for preventive maintenance
  • Immune to earth spread capacitance
  • For use in land, offshore and marine systems
  • Analogue output proportional to meter reading (F-version)
Application
The digitally controlled KPM465x monitors insulation level between a non-live non-grounded (IT)  system and its protective earth. This unit is used for land, offshore and marine installations for megging of any standby equipment.

When running, the centrifugal force and heat of windings will keep a machine dry. When machines is not running ambient humidity may condensate and form moisture traps, which, together with accumulated dust and contaminated deposits, may form leakage paths to earth.

Idling operation interrupts general insulation monitoring and leaves machine insulation to degrade uncontrolled during a lasting outage.

KPM465x can be connected to any kind of non-live electrical system, to monitor the general health during inactive operation. KPM465x will also detect any earth fault caused by break-down and flash-over carbon deposits or mechanical damage to windings and cabling.

An AC or DC auxiliary voltage is required for the unit. Only ONE KPM465E 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 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 spread capacitance.

The KPM465x measures all phases just by connection to either line or neutral point. Start of monitoring function is delayed when auxiliary power is switched on (default 10 secs delay) to avoid false reading caused by initial charging of network spread capacitance. If powered from separate source there can be a stabilizing time if there is network spread capacitance.
 
OUTPUTS
The unit has C/O relay outputs for Warning and Alarm. The Alarm relays are fail to safety configured. 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. Trip levels and delays are settable on unit rear.

All F versions have 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
The unit is megger safe but megger will measure the internal resistance of approximately 1,7Mohm if unit is connected. The unit is not for live measuring but will not be damaged if network voltage is accidentally connected.

The KPM465x range is designed to comply with specification AODC035 "Code of Practice for the Safe Use of Electricity Under Water" issued by IMCA.

INTELLIGENT SETTING ASSISTANCE
KPM465x 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.
KPM165H & KPM465HF - KPM465HG & KPM465HGFKPM16x

Scale range: 10kΩ - 500MΩ -
(>2GΩ)

KPM465G & KPM465GF - KPM465L & KPM465LFKPM16x

Scale range: 500kΩ - 5GΩ -
(>6GΩ)
KPM465E & KPM465F - KPM465N & KPM465NFKPM16x

Scale range: 15MΩ - 10GΩ -
(>12GΩ)
 
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