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Meagacon AS
INSULATION GUARD FOR IT-NETWORKS W/FREQUENCY CONVERTERS KPM163FQx

INSULATION GUARD FOR IT-NETWORKS W/FREQUENCY CONVERTERS KPM163FQx

Product catalog summary

Overview

The KPM163FQx is a digitally controlled insulation monitoring device designed for non-grounded (IT) AC mains systems with frequency converters. It is suitable for land, marine, and offshore installations and complies with IMCA D045 Code of Practice. The device monitors insulation resistance between the AC network and protective earth, providing real-time status via a meter and triple-zone LEDs indicating Alarm (red), Warning (yellow), and Healthy (green) conditions.

Key Features

Safe operation up to 1.4kV DC during megger testing when auxiliary power is off.
Direct connection up to 690V line voltage; up to 1.4kV with optional high voltage adapter CH163/1,4.
Analogue output proportional to meter reading (various output options including 4-20mA, 0-10mA, 0-20mA, 0-10V).
Immune to earth capacitance and voltage surges.
Monitoring during both live and standby conditions with auxiliary power supply.
Built-in assistance mode for easy setting and verification of trip levels and analogue output.

Application and Operation

The unit injects a DC measuring signal into the monitored system; the insulation resistance is determined by the current flow through any insulation fault path. The measuring accuracy is unaffected by normal loads on the AC network. Monitoring starts after a default 10-second delay upon auxiliary power activation, with a minimum fault detection time of 9 seconds.

Trip levels and delay times are adjustable on the rear panel. When a fault exceeds the trip level and delay, a relay trips and a trip LED flashes. The timer resets if the fault clears during the countdown.

Safety and Compliance

Input is protected against megger test voltages up to 1.4kV DC.
Voltage adapter CH163/1,4 limits signal voltage to safe levels for personnel.
Complies with EN 61010-1 Category III, Pollution Degree 2, and EMC requirements per EN 61326-2-4.
Meets IMCA D045 Code of Practice for safe underwater electricity use.

Technical Specifications

Auxiliary Supply: 100-120, 200-240, 380-415, or 440-460 VAC (40-70 Hz) with 0.5A fuse; 12-24, 48, or 110 VDC with 2A fuse; ±10% tolerance.
Power Rating: 1.5 VA.
Contact Ratings: AC: 100 VA (250 V/2A max), DC: 50 W (100 V/1A max).
Analogue Output: Up to 20 mA max 500 Ω load or up to 10 V min 100 kΩ load; other outputs on request.
Operating Temperature: -20°C to +70°C.
Weight: 0.85 kg.
Front Protection: IP52 standard, IP65 optional.

Installation and Connections

The device mounts in a DIN 96 panel cutout (92 x 92 mm). It can be connected directly to line voltages up to 690 V or via the CH163/1,4 high voltage adapter for voltages up to 1.4 kV. The adapter is a passive low-pass filter designed for 50, 60, or 400 Hz networks, potted in polyurethane with high inductance reactance modules to avoid DC saturation.

The unit includes a disable function for parallel IT networks, activated via a potential-free contact, which disconnects the measuring input and flashes the power LED every 2 seconds to indicate inactivity. A reset function is also available for latching alarms.

Operation Modes and Settings

The device features an intelligent setting assistance mode activated by adjusting trip level potentiometers. In this mode, the analogue output and meter reading reflect the potmeter setting, facilitating calibration and verification.

Alarm and warning trip levels and delays are adjustable: warning delay 0-30 seconds, alarm delay 0.1-3 seconds, trip levels adjustable up to 1 MΩ.

Output Characteristics

The analogue output is proportional to insulation resistance, with example values for a 4-20 mA output:

Open circuit (>60 MΩ): 4.00 mA
10 MΩ: 4.28 mA
3 MΩ: 4.98 mA
1 MΩ: 6.69 mA
500 kΩ: 8.67 mA
300 kΩ: 10.59 mA
200 kΩ: 12.30 mA
100 kΩ: 15.18 mA
0 Ω: 20.00 mA

Relay Operation and Indications

The unit has three relays corresponding to alarm, warning, and fail-safe functions. The fail-safe relay energizes when the unit is powered. The alarm and warning relays can be latched or non-latched depending on the model (KPM163FQ or KPM163FQG).

Ordering Information

Example: KPM163FQ with 200-240 VAC auxiliary supply and 690 VAC network voltage, analogue output 4-20 mA.

Special analogue outputs are available on request by adding suffixes to the type designation.

Manufacturer and Compliance

Produced by Megacon, the device is designed with continuous improvement in mind, and specifications may vary. The product is compliant with major classification societies' requirements for marine and offshore electrical safety.

Catalog excerpts

INSULATION GUARD FOR IT-NETWORKS W/FREQUENCY CONVERTERS KPM163FQx-1

INSULATION GUARD FOR IT-NETWORKS W/FREQUENCY CONVERTERS KPM163FQx • Designed for non-grounded networks with Frequency Converters • Direct connection up to 690V line voltage, up to 1.4kV with HV adapter CH163/1,4 • Monitoring during both live and standby conditions • For use in land, marine and offshore Installations • 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 Application Specifications Auxiliary Supply: Optional Voltage: Supply tolerance: Power rating: Contact rating: Analogue Output: F-versions The digitally controlled KPM163FQx is designed to monitor the insulation level between a nongrounded (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 KPM163FQx can be connected to each IT-system. The ohmmeter and the triple-zone status LEDs give at a glance the clear safety message: Temperature: Weight: Front protection: - ALARM (red zone) - WARNING (yellow zone) - HEALTHY (green zone) General INTELLIGENT SETTING ASSISTANCE KPM163FQx 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 (the blue LED will be lit in this mode). How to set alarm levels: Firstly adjust potmeter fully clockwise (see that meter goes to the top), then adjust potmeter down to required Warning or Alarm setpoint. 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 theAC 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. Without any movement of potmeters, the meter will revert to normal Insulation Monitoring Mode after approximately 10 seconds. 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. How to test analogue output signal: Adjust any trip level potmeter to activate Assistance Mode. Example: On a 4-20mA output, adjust potmeter fully anti clockwise for 4mAand fully clockwise for 20mA. 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. The KPM163FQx 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. OUTPUTS The KPM163FQx has an isolated analogue output proportional to meter reading. If output is used for remote meter reading, we recommend 0-1mAfor the slave indicator. SAFETY When a voltage adapter (CHx) is used the signal to terminals 4 and 6 on KPM163FQ is limited to a safe level, avoiding any dangerous voltage exposure to personnel. Norway Denmark United Kingdom www.megacon.com ELECTRONIC CONTROL AND INSTRUMENTATION Page: 1 of 2 REF: Datasheet.KPM163FQx - REV: 2.01/01.2018 © All rights reserved to Megacon Megacon reserves the right to make any changes

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INSULATION GUARD FOR IT-NETWORKS W/FREQUENCY CONVERTERS KPM163FQx-2

INSULATION GUARD FOR IT-NETWORKS W/FREQUENCY CONVERTERS ~ Relays shown de-energised, a fail-safe relay energises when unit is powered. Reset (only latching versions) KPM163FQ and KPM163FQG have an analogue output proportional to meter reading. (Special outputs are available on request) Add suffix from table below to type designation to specify output required: O/P1 0 - 10mA O/P6 N/A O/P2 0 - 20mA O/P7 N/A O/P3 4 - 20mA O/P8 0 - 10VDC O/P4 N/A O/P9 N/A O/P5 N/A O/P10 N/A Reset / Parallelling Disable Function 4 13 NOTE: See below for correct connection KPM163FQx has a built-in disable function....

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