16
MK Electric Limited
The Arnold Centre, Paycocke Road,
Basildon, Essex SS14 3EA
Telephone: 01268 563000 (National)
Fax:
01268 563563 (UK Sales)
+44 (0) 1268 563360 (International)
Email:
mk.technical@honeywell.com
Web site:
www.mkelectric.co.uk
RCBO
tripped / off
NO
Can
RCBO be
switched on
again?
Switch off or disconnect all loads and/or appliances
protected by the RCBO. Inspect all items that were
connected to the RCBO circuit and do not
re-connect any items which show obvious signs of
being faulty (unusual visual signs or smell of
overheating or other faults).
Call a qualified Electrician to investigate further.
YES
Can
RCBO be
switched on
again?
Check RCBO
operation with
test button
Transient
Fault
If tripping
re-occurs seek
expert attention
Expert attention
is needed to
correct fault
Check RCBO
is correctly
connected
Can
RCBO be
switched on
again?
Check RCBO
operation with
test button
Check RCBO
operation with
test button
Does RCBO
trip?
Fault rectified
by wiring
correction
Can
RCBO be
switched on
again?
Switch on or
reconnect loads
or appliances
one-by-one
until RCBO
trips off
This load or
appliance is
faulty. Expert
attention is
needed to
correct fault
Disconnect the
RCBO from the
circuit it is
protecting
(Load side only)
There is a
fault within the
load circuit.
Expert attention
needed to
correct fault
Switch off.
Do not use.
Contact MK
Technical Sales
Services
Switch off
RCBO.
Do not use.
Contact MK
Technical Sales
Services
YES
NO
YES
YES
NO
NO
NO
YES
9
10
1. Choose and install a suitable enclosure from the Range of MK
Sentry Consumer Units.
2. Mount the RCBO(s) on to the DIN rail in the enclosure with the
L (Supply) terminal at the bottom (shown in Figure 1).
3. It is important that the RCBO is supplied via a Double Pole
Isolator (Switch Disconnector).
4. Strip the Supply Neutral Cable and the Load Cables to expose
11mm of conductor.
5. Connect the Supply Line to the Line (Supply) Terminal at the
bottom, using the busbar supplied with the Consumer Unit.
Alternatively, a suitable cable can be used, which should be
stripped to expose 12mm of conductor for connection.
6. Connect the Neutral (Blue) flying lead of the RCBO to the
Supply Neutral Terminal Bar.
7. Connect the Earth (Cream) flying lead of the RCBO to the
Supply Earth Terminal Bar.
8. Connect the Load, Line and Neutral connections to the
outgoing terminals at the top of the RCBO, marked L (OUT)
and N (OUT), respectively.
9. Connect the Load Earth conductor to the Earth Terminal Bar.
G. INSTALLATION
11
1. Insulation resistance tests
NOTE: Disconnect the L Load, N Load and Earth before
conducting Insulation resistance testing to avoid
damage to the RCBO unit.
2. After the installation is complete, turn on the supply to the
RCBO and check that the supply voltage to the product is
present at its L (Supply) and N (Supply) connection.
3. Switch on the RCBO by moving its switch dolly upwards to
show ‘ON’ position. Press the Test Button on the device, the
device should trip.
IMPORTANT:
Upon completion, ensure that all terminal screws
are tightened to the correct torque values (Load, Line and Neutral
Terminal - 1.2 to 1.5 Nm, Supply Line Terminal - 2.0 to 2.5Nm).
10. Test the RCBO as detailed in Section H of this leaflet.
11. AFFIX LABEL SUPPLIED TO THE SENTRY
®
CONSUMER UNIT.
12. Leave this Instruction Leaflet with the end user for future use.
H. TESTING
12
4. Carry out the following tests using a calibrated RCD Tester.
Test Current Result
0.5
IΔ
n
RCBO must not trip
IΔ
n
RCBO must trip within 300 ms
2
IΔ
n
RCBO must trip within 200 ms
5
IΔ
n
RCBO must trip within 40 ms
If the device fails to trip as required in steps 3. and 4.
above, do not use the product.
Failure to trip according to 3. and 4. above, after it is
confirmed that the supply is present to the product, indicates
to a faulty product. Consult a qualified electrician or contact,
MK Electric Technical Sales and Service Department.
Telephone: 01268 563720 (National)
+44 (0) 1268 563758 (International)
Maintenance
It is recommended that the RCBO is checked regularly, at least
quarterly. Refer to Item 4 in Section E, Safety Instructions, of
this leaflet.
14
If the black portion of the switch is in the ‘OFF’
position, this is an indication that a fault has caused
the RCBO to trip.
Consult the Fault Identification Chart (Figure 2) to
establish the cause.
Any repairs to appliances or alterations to the
installation, to correct the fault, should be carried
out by a competent person.
I. TRIPPING IN SERVICE
15
The Company undertakes to replace or repair, at its discretion,
this product should it become defective within a period of
10 years after delivery, solely as a result of faulty materials
and/or workmanship. Understandably, if the product has not
been installed or maintained in accordance with the
Company’s instructions, has not been used appropriately,
or if any attempt has been made to rectify, dismantle or alter
the product in any way, the guarantee will be invalidated.
This Guarantee states the Company’s entire liability. It does
not extend to cover consequential loss or damage or
installation costs arising from the defective product. This
Guarantee does not restrict or infringe the normal statutory
or other rights of the consumer.
MK Electric Limited wishes to make it clear that it will take
all necessary legal action in any part of the world against
any party found to be manufacturing, distributing, selling or
otherwise dealing with any article which infringes the
company’s design rights, copyrights or patents in its
products, or any other rights of the company therein.
Design Right MK Electric Ltd.
J. GUARANTEE
Figure 2
Fault Identification
Chart (Section I.)
