Application
The digitally controlled KPM165x 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 and sub-sea 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 KPM165x can be connected to each IT-system.
The
ohmmeter and the triple-zone status LEDs give at a glance the clear
safety message:
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 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 (ARx, ANx or CH163-5) is used the signal to terminals
4 and 6 on KPM165x is limited to a safe level, avoiding any
dangerous voltage exposure to personnel.
The KPM165x 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 IEC60092-504 and the relevant environmental and EMC tests specified in IEC60068/60092 and IEC61000/60533 respectively, to comply with the requirements of the major Classification Societies.
INTELLIGENT SETTING ASSISTANCE
KPM165x 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 & KPM165HF - KPM165HG & KPM165HGF
Scale range: 10kΩ - 500MΩ - ∞ (>2GΩ)
Start of monitoring has a 30 secs delay. This unit is for marine,
offshore, sub-sea and ocean floor use. It has a wide measuring range in
order to detect degradation of insulation at its origin. An important
feature is the unit’s unique inhibit function, controlled by the
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 5 secs detection time for any insulation fault.
KPM165G1 & KPM165GF1 - KPM165L1 & KPM165LF1
Scale range: 500kΩ - 5GΩ - ∞ (>6GΩ)
Start of monitoring has a 30 secs delay. This unit is for marine,
offshore, sub-sea and ocean floor use. It has a wide measuring range in
order to detect degradation of insulation at its origin. An important
feature is the unit’s unique inhibit function, controlled by the
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 5 secs detection time for any insulation fault.
KPM165E1 & KPM165F1 - KPM165N1 & KPM165NF1
Scale range: 15MΩ - 10GΩ - ∞ (>12GΩ)
Start of monitoring has a 30 secs delay. This unit is for marine,
offshore, sub-sea and ocean floor use. It has a wide measuring range in
order to detect degradation of insulation at its origin. An important
feature is the unit’s unique inhibit function, controlled by the
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 5 secs detection time for any insulation fault.
Direct connection up to 500V line voltage.
Voltage range up to 25kV via
HV adaptor ARx or ANx series and
CH163x series.
