FT Series Transfer Switches
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PS05805004K/G
Fire Pump Controllers
1-1
Features
Typical Specifications
1.
Approvals
A.
The Fire Pump Controller and Transfer Switch combi-
nation shall meet the requirements of the latest edition
of NFPA 20 and shall be listed by [Underwriters Labora-
tories (UL)] and approved by [Factory Mutual] (FM) **,
[Canadian Standards Association (CSA)] and [New
York Department of Buildings (NYSB)] for fire pump
service.
B.
The transfer switch shall meet UL 1008 and shall be
regularly subjected to Endurance, Interrupting Capacity,
and Dielectric Voltage-Withstand test as outlined by UL
489 standards.
2.
Ratings
A.
The transfer switch shall be suitable for the available
short circuit current at the line terminals of the control-
ler.
B.
The transfer switch shall have an ampere rating not
less than 115% of the motor full-load current.
3.
Construction
A.
The transfer switch shall be installed in a barriered
compartment of the fire pump controller. The complete
assembly, controller and transfer switch, shall be
shipped as a single unit.
B.
A single uni-gear motor shall electrically operate the
transfer mechanism. It shall also be capable of being
operated manually and shall have suitable provisions
for readily disengaging the gear motor when necessary.
C.
The transfer switch shall be mechanically and electrical-
ly interlocked so that it shall not be possible for the load
circuits to be connected to normal and emergency
sources simultaneously, regardless of whether the
switch is electrically or mechanically operated. The
switch shall have a manual neutral.
D.
The alternate side shall be provided with an isolation
switch sized to a minimum of 115% of the motor full-
load current and a circuit breaker having a continuous
current rating not less than 115% of the motor full load
amps. The isolation switch shall have overcurrent sens-
ing elements of the non-thermal type, and instantane-
ous short-circuit overcurrent protection. (This does not
apply to FPATS Stand Alone and FT20 Limited Service
Transfer Switch Controllers.)
The isolating switch and circuit breaker shall be me-
chanically interlocked and operated by a single handle.
(This does not apply to FT20 Limited Service Transfer
Switch Controllers.)
The isolating switch shall be supervised to indicate
when it is opened by audible and visual alarms.
E.
An auxiliary contact shall be provided to prevent send-
ing of the signal for starting of the alternate source gen-
erator when the transfer switch commands it, if the iso-
lation switch on the alternate source side of the transfer
switch is open.
F.
The transfer switch shall be provided with locked rotor
overcurrent protection. The locked rotor protector shall
be calibrated and set to a minimum of 300% of the mo-
tor full-load current and have a tripping time between 8
and 20 seconds.(This does not apply to FT20 Limited
Service Transfer Switch controllers.)
4.
Enclosure
A.
The controller shall be housed in a NEMA Type 2 (IEC
IP11) drip-proof, powder baked finish, freestanding en-
closure.
5.
Microprocessor Control
A.
A solid state sensing and control logic panel shall be
separately mounted from the power-switching portion of
the transfer switch. The two sections shall be connect-
ed together by control cables and plug-in connectors.
The control section shall be capable of being isolated
from the power section for maintenance.
B.
The normal power source shall be set to pickup at 95%
and drop out at 85% of nominal supply. The voltage
sensing on the alternate supply shall be set to pickup at
95% of nominal voltage.
C.
All voltage sensing, frequency sensing, and timer set
points shall be field adjustable.
D.
The transfer switch shall automatically transfer its load
circuit to an emergency or alternate power supply upon
failure of the normal or original supply. In order to over-
ride momentary fluctuations in the system, a time delay
transfer from normal to alternate power supply shall be
adjustable up to 1800 seconds. Upon restoration of the
normal supply, the transfer switch shall automatically
retransfer its load circuits to the normal supply. Me-
chanically held transfer mechanisms shall be energized
only momentarily during transfer or retransfer.
E.
If the emergency / standby power should fail while car-
rying the load, transfer to the normal supply shall be
made instantaneously upon restoration of the normal
source to satisfactory conditions.
F.
The transfer switch shall come complete with five LED's
to provide visual indication of the unit status, source 1
available, source 1 connected, source 2 available, and
source 2 connected.
G.
An engine test button shall be provided that will initiate
an engine test.
H.
A silence alarm button shall be provided that will silence
the alarm buzzer.
6.
Alarm Relays
A.
1 Form-C contact shall be provided for remote indica-
tion for source 1 connected or source 2 connected.
B.
2 Form-C contacts shall be provided for remote indica-
tion for the alternate source-isolating switch open.
7.
Manufacturer
A.
The manufacturer of the assembly shall be the manu-
facturer of major components and control modules in-
stalled within the assembly.
B.
The Transfer Switch Fire Pump Controller shall be of
the LMR Plus type as manufactured by Eaton Industries
(Canada) Company.
C.
Models:
FT20 Limited Service
FT30 Across the Line
FT40 Part Winding
FT50 Primary Resistor
FT60 Autotransformer
FT70 Wye-Delta (Star Delta) Open Transition
FT80 Wye-Delta (Star Delta) Closed Transition
FT90 Soft Start
FPATS Stand Alone Transfer Switch
June 2014
** NOTE: FPATS Stand Alone and FT20 Limited Service Transfer Switch controllers, do not carry FM Approval.
