- 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
- Built-in fast analogue Amp or Hz transducer (Optional)
Application
The digitally controlled true RMS measurement on the KEC115x 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. It can also be supplied with a built-in current (KEC116x)
or frequency transducer (KEC117x).
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.
KEC115x is the standard range with relay outputs for overcurrent and short circuit current trip. The highest phase current will activate the OC/SC levels.
KEC116x range also include a fast response (<50mS) built-in Current transducer
proportional to the HIGHEST phase current signal. This may be used as
an input to a control system, to detect abnormal current conditions
(loss of excitation etc).
KEC117x range also include a fast response (<50mS) built-in frequency transducer. This may be used as an input to a control system.
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. 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.
The unit meets EN 61010-1 Cat. III, Pollution degree 2 and the relevant environmental and EMC tests specified in EN 61326-2-4 to comply with the requirements of the major Classification Societies.
Description
Short Circuit and Over Current VATOR Guard
KEC115E - KEC116E - KEC117x
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.
Short Circuit and Over Current VATOR Guard
KEC115E2 - KEC116E2 - KEC117E2
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.
Short Circuit and Over Current Guard
KEC115F - KEC116F - KEC117F
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.
Short Circuit and Over Current Guard
KEC115F2 - KEC116F2 - KEC117F2
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.
Short Circuit and Over Current Guard
KEC115G - KEC116G - KEC117G
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.
Short Circuit and 2-level Over Current Predictor Guard
KEC115H - KEC116H - KEC117H
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.
Short Circuit and 2-level Over Current Guard
KEC115H4 - KEC116H4 - KEC117H4
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.
Short Circuit and 2-level Over Current Predictor Guard
KEC115H5 - KEC116H5 - KEC117H5
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 is used for
bus-tie breaker opening or for preference load tripping.
Short Circuit, VATOR Over Current and Predictor Guard
KEC115P - KEC116P - KEC117P
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.
Short Circuit and Over Current Predictor Guard
KEC115P2 - KEC116P2 - KEC117P2
Definite time O/C and S/C trip delays. 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.
Short Circuit and Over Current Predictor Guard (S/C only)
KEC115P3 - KEC116P3 - KEC117P3
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.
