KPM 16xM
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AC INSULATION GUARD WITH HIGH ENERGY DC PROTECTION KPM16xM • Direct connection up to 500V line voltage, up to 5kV with HV adapter • Monitoring during both live and standby conditions • Protection against harmful DC voltage exposure • ”Megger” - safe to 1.4kVDC when aux power is OFF • Immune to earth capacitance and voltage surges • For use in land, marine, offshore, sub-sea and ocean floor Installations • Analogue output proportional to meter reading (F-version) Application Specifications KPM161M & KPM161MF - KPM161GM & KPM161GMF Scale range: 0-1000kΩ - (>10MΩ) Network line voltage: 0-500V (40/400Hz) Adjustments Trip level Delay WARNING: 0-1MΩ 0-30secs ALARM: 0-1MΩ 0,1-3secs KPM163M & KPM163MF - KPM163GM & KPM161GMF Scale range: 0-10MΩ - (>100MΩ) Network line voltage: 0-500V (40/400Hz) up to 5kV with voltage adapter Adjustments Trip level Delay WARNING: 0-10MΩ 0-30secs ALARM: 0-10MΩ 0,1-3secs General Auxiliary Supply: 100-120, 200-240, 380-415 or 440-460VAC, 40-70Hz (Fuse 0.5A) Optional Voltage: 12-24VDC (Fuse 2A) Contact rating: AC: 100VA - 250V/2A max. DC. 50W - 100V/1A max. Analogue Output: Up to 20mA, max 500R Up to 10V, min 100kohm (other on request) Temperature: Weight: Front protection: NOTE: The standard Insulation Guards KPM161x and KPM163x are protected against sporadic AC and DC voltage surges imposed on the monitoredAC network. The digitally controlled KPM16xM 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) in marine and offshore installations. 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 to 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. 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 KPM16xM 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) General HIGH ENERGY DC VOLTAGE IN YOUR AC MAINS, AN UNKNOWNAND NEGLECTED PROBLEM Experience has confirmed that full cycle half-wave and partial cycle full-wave rectifier/regulator loads, inverter asymmetrical phases output or a semiconductor failure in heavy power rectifiers/inverters may impose high energy DC voltage on the AC supply line voltages. Intermittent or ENDURING imposed DC voltage is reported to be up to several hundred volts with positive or negative polarity relative to protective earth. This DC voltage will distort insulation measurements, and may cause breakdown of protective guards The uncontrolled DC energy can cause functional problems by saturating magnetic cores and influence performance of current and voltage transformers, reactors, motors, regenerative drives, generators and regulators. It is also a fact that this serious malfunction normally remains undetected and unknown to the crew. The M-variant therefore includes a unique DC voltage detection function with an alarm output. Exposure to enduring high energy DC voltage (reported to be up to several hundred volts with positive or negative polarity) will instantaneously cause the meter to read false insulation value and may destroy the unit. When a “foreign” positive DC voltage exceeding 17V or a negative DC voltage exceeding 3V are detected on the monitored AC supply the DC detection function will within 20 seconds disable the insulation measuring function to avoid false readings, isolate the unit input, activate LED “DC EXPOSURE” and trip relay 3. In this mode unit will sustain continuos high-energy exposure up to +/- 800VDC. The “pathfinder” function identifies polarity of imposed DC. At 10 minutes intervals the unit senses if DC is still present and will reset automatically and restore normal operation when DC exposure ends. To detect presence of harmful DC voltage connect a voltmeter between any AC supply line voltage and protective earth, and set the meter function switch toAC and DC alternately. REF: Datasheet.KPM16xM - REV: 1.06 Megacon reserves the right to make any changes to the information at any time

AC INSULATION GUARD WITH HIGH ENERGY DC DETECTOR PROTECTION Relay Operation KPM161M & KPM161M - KPM161GM & KPM161GMF Scale range: 0-1000kΩ - (>10MΩ) This unit is used for hospital, industrial, marine and offshore installations. Start of monitoring function is delayed when auxiliary power is switched on (default 5 secs delay). Fail Safe Direct connection up to 500V line voltage. Positive DC Exposure Output table (example for 4-20mA) Range Relay Operation Description KPM163M & KPM163MF - KPM163GM & KPM163GMF Scale range: 0-10MΩ - (>100MΩ) This unit is used for marine, ROV and offshore...

AC INSULATION GUARD WITH HIGH ENERGY DC DETECTOR PROTECTION KPM16xM Outputs Relays shown de-energised, a fail-safe relay energises when unit is powered. Reset (only latching versions) The unit has C/O relay outputs for insulation Warning and Alarm and DC exposure alarm. The insulation alarm relay is fail to safety configured. The trip LED flashes when the set 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. 10 2 KPM161MF, KPM161GMF, KPM163MF and KPM163GMF have an...