K P M 1 6 x0 pages

INSULATION GUARD FOR NON-GROUNDED AC NETWORKS

KPM16x
• Direct connection up to 500V line voltage, up to 25kV with
HV adapter
• Monitoring during both live and standby conditions
• For use in land, marine, offshore, sub-sea and ocean floor
Installations
• 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)

Application

Specifications
General
Auxiliary Supply:
Optional Voltage:
Contact rating:
Analogue Output:
F-versions

100-120, 200-240, 380-415 or
440-460VAC, 40-70Hz (Fuse 0.5A)
12-48VDC (>9 - <60VDC)
(Fuse 2A)
AC: 100VA - 250V/2A max.
DC: 50W - 100V/1A max.
Up to 20mA, max 500R
Up to 10V, min 100kohm

The digitally controlled KPM16x 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 KPM16x can be connected to each IT-system. The ohmmeter and
the triple-zone status LEDs give at a glance the clear safety message:
- ALARM (red zone)
- WARNING (yellow zone)
- HEALTHY (green zone)

(other on request)

Temperature:
Weight:
Front protection:

-20 to +70ºC
0.62kgs
IP54 (IP65 optional)

General
INTELLIGENT SETTING ASSISTANCE
KPM16x 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.

IDV MEASURING PRINCIPLE
Insulation is measured between the complete galvanically interconnected AC network and its protective earth.
The unit injects a DC voltage 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.
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 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. Without any
movement of potmeters, the meter will
revert to normal Insulation Monitoring
Mode after approximately 10 seconds.
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.
OUTPUTS
All F versions have 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, ANx or ARx) is used the signal to terminals 4 and 6 on KPM163x and KPM165x is
limited to a safe level, avoiding any dangerous voltage exposure to personnel.
NOTE
Special versions of the KPM161 and KPM163 are available as:

The KPM16x range is designed to comply with specification AODC035 “Code
of Practice for the Safe Use of Electricity Under Water” issued by IMCA.

KPM161M & KPM163M - Insulation guard with DC detection function, protected against high-energy DC voltage
imposed on the monitoredAC supply.

Norway
Denmark
United Kingdom

www.megacon.com
ELECTRONIC CONTROL AND INSTRUMENTATION

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REF: Datasheet.KPM16x - REV: 1.16/02.2013
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