MK Electric Catalogue No. 49

454 / 759

454
WIRING DEVICES
Standards and approvals
Comply with BS EN 60669-2-4:2005
TECHNICAL SPECIFICATION
ELECTRICAL
VOLTAGE RATING
250V a.c.
CURRENT RATING
10A
RATED CONDITIONAL SHORT
CIRCUIT CURRENT (Inc)
3000A
TERMINAL CAPACITY
4 x 1mm²
4 x 1.5mm²
3 x 2.5mm²
2 x 4mm²
1 x 6mm²
CONTACT GAP
4mm switch contact gap
RECOMMENDED SCPD
GE Power Controls TIA32M40 32A IEC269-2-1 Fuse-link
PHYSICAL
AMBIENT OPERATING TEMPERATURE
-5°C to +40°C
IP RATING
IP4X
MAX. INSTALLATION ALTITUDE
2000 metres
Features
l Switchlock list no. K4858 is available to allow
the isolator to be locked in the disconnected
position to facilitate fan maintenance
Description
The MK Three Pole Fan Isolator provides a safe and simple method of isolating
mechanical fan units and is particularly useful in bathrooms, toilets, storerooms and
basements where there is little or no natural light.
For example, timer controlled fans are often linked into the lighting circuit for energy
saving and convenience. In such an installation there is often a need for the lighting
circuit to remain live to provide light whilst the fan unit is externally isolated so that
routine maintenance and repairs can be carried out in complete safety.
The fan isolator can be used as a double pole or triple pole isolator. In addition it
includes a clear on/off indicator and the frontplate features a fan isolator symbol for
easy circuit identification.
L2 L1N
L2 L1N
N
Rear view of
Fan Isolator
Rear view of
Fan Isolator
Rear view of
Fan Isolator
Rear view of
Fan Isolator
L (switched)
N
L
Supply
L2 L1N
L2 L1N
N
L (unswitched)
To Fan Unit with Timer
(see Fan Unit Intructions)
L (switched)
N
L
Supply
L2 L1N
L2 L1N
N
L (unswitched)
To Fan Unit with Timer
(see Fan Unit Intructions)
L (switched)
N
L
Supply
L2 L1 N
L2 L1 N
N
To Fan Unit without Timer
(see Fan Unit Intructions)
To Fan Unit without Timer
(see Fan Unit Intructions)
L (switched)
N
L
Supply
Three pole switching for fan units incorporating timers
Two pole switching for fan units without timers
TOP
TOP
TOP
TOP
Wiring diagrams
Three Pole Fan Isolators
Wiring Devices Technical