KEC115x - KCC115x - Three Phase Current Guards - Current Guards AC

KEC115x and KEC116x Series

KEC115x and KEC116x - AC GENERATOR SHORT CIRCUIT (S/C) AND OVER CURRENT (O/C) GUARD

Three phase Current Protection with VATOR, Definite time or Two level O/C trip function
"PREDICTOR" function, The Blackout Preventer
"Pathfinder" function eases fault finding
Independent ammeter with Full Load Current (FLC) mark on scale
Triple relay operation gives more flexibility
Fast analogue mA output (KEC116x versions)

Application
The digitally controlled true RMS measurement provides precision (1,0%) three phase current protection for AC generators, motors, transformers etc. for alarms or tripping of a non-essential load or breaker.

The independent class 1,5 moving iron ammeter input (term. 26 & 27) MUST be externally connected or switched to read individual phase currents.

User settable trip levels and delays. LEDs flash during countdown and indicate the alarm status. The "Pathfinder" function identifies the phase causing the trip by the flashing pattern of the LED.

KEC116x models have a fast response (<50mS) analogue output signal proportional to the HIGHEST phase current. This may be used as an input to a control system, to detect abnormal current conditions (loss of excitation etc).

VATOR (VAriable Time Overcurrent Release function)
Versions with VATOR function have definite trip time up to 150% generator over current load. Between 150-200% the trip time will be reduced dynamically based on a calculated curve to maintain thermal capability protection and selective protection between parallelled generators.

Refer to the VATOR calculation excel sheet for further details of the time release curve.

PREDICTOR
The main feature of the Predictor function is to open bus-tie breakers or trip heavy loads to prevent a total blackout situation. The predictor relay(s) trips at set over current (O/C) or short circuit current (S/C) level, prior to the generator breaker trip. If the overload condition is still present after this load reduction the generator breaker will trip 1sec or 200mS later relative to set O/C or S/C time delays.

The combination of VATOR and Predictor is the ultimate solution for electrical selectivity and thermal protection of parallelled generators.

PATHFINDER
The Pathfinder indicates the phase causing an over current or short circuit trip by the flashing pattern of the relevant LED.

Unit meets IEC60092-504 and relevant environmental and EMC tests specified in IEC60068/60092 and IEC61000/60533 respectively, to comply with Classification Societies requirements.

Description
KEC115E and KEC116E - Short Circuit and Over Current VATOR Guard

O/C VATOR and definite time S/C trip delays maintain discrimination between parallelled generators. The fail-safe relay R3 (O/C & S/C) should be used to open the generator breaker. R1 (S/C) and R2 (O/C) can be used for local indication, alarm system or PM-System etc. All relays latch after trip.

KEC115E2 and KEC116E2 - Short Circuit and Over Current VATOR Guard
O/C VATOR and definite time S/C trip delays. R2 (O/C) and the fail-safe relay R1 (S/C) should be used to open the generator breaker. The common alarm relay R3 (S/C & O/C) can be used for local indication, alarm system or PM-System etc. All relays latch after trip.

KEC115F and KEC116F - Short Circuit and Over Current Guard
Replaces the classic KEC115. Definite time O/C and S/C trip delays. Fail-safe S/C relay. All relays latch after trip. Either R1 (S/C) and R2 (O/C) can be used to trip generator breaker with R3 as a common alarm or R3 can trip the generator breaker with R1/R2 used for local indication, PMS or alarm system input etc.

KEC115F2 and KEC116F2 - Short Circuit and Over Current Guard

Definite time O/C and S/C trip delays. Either R1 (S/C) and R2 (O/C) can be used to trip generator breaker with R3 as a common alarm or R3 can trip the generator breaker with R1/R2 used for local indication, PMS or alarm system input etc. NON fail- safe latching relays. Since all relays are NON fail-safe this version is only suitable as a replacement for older installations.

KEC115G and KEC116G - Short Circuit and Over Current Guard

For marine emergency/harbour generator sets. Definite time O/C and S/C trip delays. Non-latching O/C trip relay (R2) and non-failsafe S/C trip relay (R1). If an engine is set as an emergency generator only R1 (S/C) shall be used to open the generator breaker as per the requirements of classification societies. In harbour operation both relay R1 and R2 shall open the breaker. R3 operates on both S/C and O/C and can be used for alarm system input etc.

KEC115H and KEC116H - Short Circuit and 2-level Over Current Predictor Guard

2-level O/C settings. Definite time O/C and S/C trip delays. Instead of the VATOR function the H-versions have 2 over current set trip levels to reduce trip time in high over load situations. "Predictor" early action on relays R1 and R2, both relays will trip after full set O/C or S/C time. R3 is delayed and will trip after full set O/C time + 1sec or S/C time + 200mS. R3 is used to open the generator breaker. R1 or R2 are used for bus-tie breaker opening or for preference load tripping.

KEC115H4 and KEC116H4 - Short Circuit and 2-level Over Current Guard

2-level O/C settings. Definite time O/C and S/C trip delays. Instead of the VATOR function the H-versions have two over current set trip levels to reduce trip time in high over load situations. All relays will trip after full set time. Individual alarm relay outputs give flexibility for a variety of applications.

KEC115H5 and KEC116H5 - Short Circuit and 2-level Over Current Predictor Guard

2-level O/C settings. Definite time O/C trip delays. "Predictor" early action on R1 and R2 , both relays will trip after full set O/C or S/C time. R3 is delayed and will trip after full set O/C time + 1sec or S/C time + 200mS. R3 is used to open the breaker. R1 is used for bus-tie breaker opening or for preference load tripping.

KEC115P and KEC116P - Short Circuit, VATOR Over Current and Predictor Guard

The best choice for diesel electric systems to prevent totally black out. VATOR O/C trip delay. Fail safe and latching R3. "Predictor" early action on relays R1 and R2, R2 will trip after full set O/C and R1 after full set S/C time. R3 is delayed and will trip after full set O/C time + 1sec or S/C time + 200mS. R3 is used to open the generator breaker. R1 and/or R2 are used for bus tie breaker opening, preference load tripping, PMS or alarm system input etc.

KEC115P2 and KEC116P2 - Short Circuit and Over Current Predictor Guard

Definite time O/C and S/C trip delays. Fail safe and latching R3. "Predictor" early action on relays R1 and R2, both relays will trip after full set O/C or S/C time. R3 is delayed and will trip after full set O/C time + 1sec or S/C time + 200mS. R3 is used to open the generator breaker. R1 and/or R2 are used for bus tie breaker opening, preference load tripping, PMS or alarm system input etc.

KEC115P3 and KEC116P3 - Short Circuit and Over Current Predictor Guard (S/C only)

Definite time O/C and S/C trip delays. Fail safe and latching R3. "Predictor" early action on relay R1 and R2, both relays will trip after full set S/C time. R3 is delayed and will trip after full set O/C time + 1sec or S/C time + 200mS. R3 is used to open the generator breaker. R1 and R2 are used for bus tie breaker opening, preference load tripping, PMS or alarm system input etc.

KCC115x and KCC116x Series

KCC115x and KCC116x - AC GENERATOR SHORT CIRCUIT (S/C) AND OVER CURRENT (O/C) GUARD

Three phase Current Protection with VATOR, Definite time or Two level O/C trip function
"PREDICTOR" function, The Blackout Preventer
"Pathfinder" function eases fault finding
Triple relay operation gives more flexibility
Analogue output proportional to highest phase current can be used to improve supply reliability (KCC116x versions)
Optional DIN96 Slave Indicator with Status LEDs

Application

The digitally controlled true RMS measurement provides precision (1,0%) three phase current protection for AC generators, motors, transformers etc. for alarms or tripping of a non-essential load or breaker.

User settable trip levels and delays. LEDs flash during countdown and indicate the alarm status. The "Pathfinder" function identifies the phase causing the trip by the flashing pattern of the LED.

KCC116x models have a fast response (<50mS) analogue output signal proportional to the HIGHEST phase current. This may be used as an input to a control system, to detect abnormal current conditions (loss of excitation etc).

Complementing DIN96 Slave Indicator (MCI96) with RJ12 plug available.

VATOR (VAriable Time Overcurrent Release function)
Versions with VATOR function have definite trip time up to 150% generator over current load. Between 150-200% the trip time will be reduced dynamically based on a calculated curve to maintain thermal capability protection and selective protection between parallelled generators.

Refer to the VATOR calculation excel sheet for further details of the time release curve.

PREDICTOR
The main feature of the Predictor function is to open bus-tie breakers or trip heavy loads to prevent a total blackout situation. The predictor relay(s) trips at set over current (O/C) or short circuit current (S/C) level, prior to the generator breaker trip. If the overload condition is still present after this load reduction the generator breaker will trip 1sec or 200mS later relative to set O/C or S/C time delays.

The combination of VATOR and Predictor is the ultimate solution for electrical selectivity and thermal protection of parallelled generators.

PATHFINDER
The Pathfinder indicates the phase causing an over current or short circuit trip by the flashing pattern of the relevant LED.

Unit meets IEC60092-504 and relevant environmental and EMC tests specified in IEC60068/60092 and IEC61000/60533 respectively, to comply with Classification Societies requirements.

Description

KCC115E and KCC116E - Short Circuit and Over Current VATOR Guard

O/C VATOR and definite time S/C trip delays maintain discrimination between parallelled generators. The fail-safe relay R3 (O/C & S/C) should be used to open the generator breaker. R1 (O/C) and R2 (S/C) can be used for local indication, alarm system or PM-System etc. All relays latch after trip.

KCC115E2 and KCC116E2 - Short Circuit and Over Current VATOR Guard
O/C VATOR and definite time S/C trip delays. R2 (O/C) and the fail-safe relay R1 (S/C) should be used to open the generator breaker. The common alarm relay R3 (S/C & O/C) can be used for local indication, alarm system or PM-System etc. All relays latch after trip.

KCC115F and KCC116F - Short Circuit and Over Current Guard
Replaces the classic KCC115. Definite time O/C and S/C trip delays. Fail-safe S/C relay. All relays latch after trip. Either R1 (S/C) and R2 (O/C) can be used to trip generator breaker with R3 as a common alarm or R3 can trip the generator breaker with R1/R2 used for local indication, PMS or alarm system input etc.

KCC115F2 and KCC116F2 - Short Circuit and Over Current Guard

KCC115G and KCC116G - Short Circuit and Over Current Guard

For marine emergency/harbour generator sets. Definite time O/C and S/C trip delays. Non-latching O/C trip relay (R1) and non-failsafe S/C trip relay (R2). If an engine is set as an emergency generator only R2 (S/C) shall be used to open the generator breaker as per the requirements of classification societies. In harbour operation both relay R1 and R2 shall open the breaker. R3 operates on both S/C and O/C and can be used for alarm system input etc.

KCC115H and KCC116H - Short Circuit and 2-level Over Current Predictor Guard

2-level O/C settings. Definite time O/C and S/C trip delays. Instead of the VATOR function the H-versions have 2 over current set trip levels to reduce trip time in high over load situations. "Predictor" early action on relays R1 and R2, both relays will trip after full set O/C time or S/C time. R3 is delayed and will trip after full set O/C time + 1sec or S/C time + 200mS. R3 is used to open the generator breaker. R1 or R2 are used for bus-tie breaker opening or for preference load tripping.

KCC115H4 and KCC116H4 - Short Circuit and 2-level Over Current Guard

KCC115H5 and KCC116H5 - Short Circuit and 2-level Over Current Predictor Guard

2-level O/C settings. Definite time O/C trip delays. "Predictor" early action on R1 and R2, both relays will trip after full set O/C or S/C time. R3 is delayed and will trip after full set O/C time + 1sec or S/C time + 200mS. R3 is used to open the breaker. R1 and R2 are used for bus-tie breaker opening or for preference load tripping.

KCC115P and KCC116P - Short Circuit, VATOR Over Current and Predictor Guard

The best choice for diesel electric systems to prevent totally black out. VATOR O/C trip delay. Fail safe and latching R3. "Predictor" early action on relays R1 and R2, R1 will trip after full set O/C and R2 after full set S/C time. R3 is delayed and will trip after full set O/C time + 1sec or S/C time + 200mS. R3 is used to open the generator breaker. R1 and/or R2 are used for bus tie breaker opening, preference load tripping, PMS or alarm system input etc.

KCC115P2 and KCC116P2 - Short Circuit and Over Current Predictor Guard

Definite time O/C and S/C trip delays. Fail safe and latching R3. "Predictor" early action on relays R1 and R2, R1 will trip after full set O/C and R2 after full set S/C time. R3 is delayed and will trip after full set O/C time + 1sec or S/C time + 200mS.R3 is used to open the generator breaker. R1 and/or R2 are used for bus tie breaker opening, preference load tripping, PMS or alarm system input etc.

KCC115P3 and KCC116P3 - Short Circuit and Over Current Predictor Guard (S/C only)

Definite time O/C and S/C trip delays. Fail safe and latching R3. "Predictor" early action on relay R1 and R2, both relays will trip after full set S/C time. R3 is delayed and will trip after full set O/C time + 1sec or S/C time + 200mS. R3 is used to open the generator breaker. R1 and R2 areused for bus tie breaker opening, preference load tripping, PMS or alarm system input etc.