KCC115x/116x - Three Phase Current Guards - Current Guards AC or DC

KCC115x and KCC116x Series

KCC115x and KCC116x - AC GENERATOR SHORT CIRCUIT AND OVER CURRENT GUARD

Three phase Current Protection with VATOR, Definite time or two individually settable O/C trip function
The Predictor function (The Blackout Preventer)
The Pathfinder function eases fault finding
For use with 1A or 5A current transformers
Triple relay operation gives more flexibility
Up to two individual very fast analogue output signals (<50mS), (optiona)
DIN96 Slave Indicator with full current scale (optional)

Description

The digitally controlled true RMS measurement on the KCC115x & KCC116x 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. Colour of LEDs indicate alarm status. Alarm LEDs flash during count-down.

OUTPUTS
Up to two individual very fast analogue output signals (optional) proportional to highest up current. This may be used as an input to a control system, to detect abnormal current conditions (loss of excitation etc). The analogue output is isolated from the CT and auxiliary power.

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.

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.

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. When either short circuit or over current trips have operated the relevant LED will flash in the following pattern to indicate the phase producing the trip.

Description

KCC115E - KCC116EA - KCC116EB

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 - KCC116E2A - KCC116E2B
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 - KCC116FA - KCC116FB
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 (O/C) and R2 (S/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 - KCC116F2A - KCC116F2B

Short Circuit and Over Current Guard
Definite time O/C and S/C trip delays. Either R1 (O/C) and R2 (S/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.

KCC115G - KCC116GA - KCC116GB

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 - KCC116HA - KCC116HB

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.

KCC115H4 - KCC116H4A - KCC116H4B

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.

KCC115H5 - KCC116H5A - KCC116H5B

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 - KCC116PA - KCC116PB

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 - KCC116P2A - KCC116P2B

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 - KCC116P3A - KCC116P3B

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.

Related Products:

KEC115/6/7x series
(Panel mounting)