INSULATION GUARD FOR NON-GROUNDED AC NETWORKS
Direct connection up to 690V line voltage, up to 6,6kV with HV adapter for both single or three phase systems
(Panel mounting)
Product Description
- Direct connection up to 690V line voltage, up to 6,6kV with HV adapter for both single or three phase systems
- Monitoring during both live and standby conditions
- For use in land, marine, offshore, sub-sea and ocean floor installations
- Triple-zone insulation monitoring
- Complies with IMCA D 045 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)
The digitally controlled KPM163x 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 KPM163x 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 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 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.
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 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 KPM163x is limited to a safe level, avoiding any dangerous voltage exposure to personnel.
The KPM163x 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.
NOTE
KPM563x series
Insulation Guards with DC detection function, protected against high-energy DC voltage imposed on the monitored AC supply.
KPM263x series
Insulation Guards with measuring loop continuity monitoring.
INTELLIGENT SETTING ASSISTANCE
KPM163x 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.
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)
Up to 6,6kV via HV adaptor CH163x or AN6,6 series.
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)
Up to 6,6kV via HV adaptor CH163x or AN6,6 series.
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).
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.
Up to 6,6kV via HV adaptor CH163x or AN6,6 series.
