630A
RS 630A
CB 250A
ALL VACUUM INTERRUPTER SOLUTION
MCR Standard Configurations and Dimensions
MCR
Rated Voltage
12kV + 15kV
Impulse Withstand Voltage
75kV (95kV)
Normal Current
Ring Switches
630A
Circuit Breaker
250A (630A)
Short Circuit Peak Making Current
Ring Switches
50kA
Circuit Breaker
50kA
Short Circuit Breaking Current
Circuit Breaker
20kA RMS
3 Second Short Time Current
Ring Switches
20kA
Circuit Breaker
20kA
Earth Switch Peak Making Current
Ring Switches
50kA
Circuit Breaker
7.9kA (50kA)
Internal Arc Rating
Freestanding
20kA 1 sec
Substation
20kA 1 sec
Optional Cable Boxes Internal Arc Rating
12.5kA 1 sec (20kA)
Gas pressure
Min Operating Pressure
0 Bar G
IP Rating
Up to IP33 (IP54)
Weight
4 Way 680Kg, 3 Way 540Kg
Testing standards
BS EN 60265-1 BS EN 60129 BS EN 60694 BS EN 60298 IEC 60056 ENA TS 41-36 IEC 62271-102 IEC 62271-100 IEC 62271-103 Technical data
(ratings in brackets are optional)
ENGINEERING
BRILLIANT SOLUTIONS
MCR - Multi Circuit Range
LS00004 TECH MCR 06 2008 (500) 6332
www.lucyswitchgear.com
Lucy Switchgear
Howland Road, Thame, Oxfordshire, OX9 3UJ, UK
tel: +44 (0)1844 267267 fax: +44 (0)1844 267223
email: sales@lucyswitchgear.com
Lucy Middle East
PO Box 17335, Jebel Ali, Dubai, United Arab Emirates
tel: +9714 883 2110 fax: +9714 883 2113
email: sales@lucyme.ae
The Saudi Lucy Company Ltd
PO Box 834, Al-Khobar, 31952, Saudi Arabia
tel: +966 3 8823057 fax:+ 966 3 8822553
email: mudassir@saudi-lucy.com 6332 MCR Reprint May08.fh11 27/8/08 11:07 Page 2
DESIGN
The Lucy MCR is a non-extensible ring main unit comprising of
3 or 4 functions in one common tank. It comprises of up to 4
vacuum circuit breaker units or a combination of vacuum circuit
breakers and fault-make load break switches located in a stainless
steel enclosure. The unit is suitable for both indoor and outdoor
applications and can be used either as a freestanding unit or
installed in compact mini-substations.
Stainless Steel Enclosure
The switching enclosure is manufactured from stainless steel and
fabricated utilising automatic robot welding techniques to
produce the highest integrity housings.
Housing
The housing itself is fully treated; using zinc coated steel and
electrostatically applied oven cured paint, to resist weather and
pollution attacks. Units can be provided with a hinged,
weatherproof and lockable door. The unit can be modified to
allow for a variety of cable types and installations.
Circuit Breaker
The circuit breaker comprises of three vacuum interrupters, which
have a fault-make, fault-break rating. Opening of the circuit
breaker is achieved by manually operating the handle
or via one of the many protection options available.
Earthing of the outgoing cable, from the circuit breaker, is
achieved by the use of the circuit breaker in series with the
off-load disconnector/selector switch.
Ring Switches
There are two options for the fault-make load break
switches where required. Ring switches can be provided using
fully rated vacuum interrupters or utilising proven single break
3 position switches. Both designs provide ON, OFF and
EARTH functionality.
Design
The Lucy MCR constitutes a new approach by Lucy to Ring Main Units. The MCR is a panel
style unit designed for front entry cabling. The unit can be used for indoor or outdoor
application and is designed for long service life and virtually zero maintenance.
Operation
All operating positions and instructions are indicated on the
main panel at the front of the unit. Operation is by means of
manually independent mechanisms, which are mounted external
to the main enclosure.
Vacuum circuit breakers have two operating positions, ON or
OFF, with an off-load, interlocked selector allowing isolation
and earthing of the circuits.
Test Facilities
Fully interlocked test facilities are provided in accordance with
ENATS 41-36 Issue 2 and the very latest IEC requirements.
The MCR has integral ring switch cable and circuit breaker test
facilities as an option.
Interlocks
Positive safety interlocks are incorporated on all switch positions
to prevent mal-operation.
Padlocks
All switch and selector positions can be padlocked.
Transformer Protection
The circuit breaker enables the MCR to protect transformers
with ratings well in excess of those achievable with a HV fused
unit. Protection is achieved by the use of ring core current
transformers in combination with Time Limit Fuse links or a
protection relay. The ring core current transformers are mounted
around the bushings, external to the switching chamber, but
within the cladding of the unit. The Time Limit Fuses, or the
protection relay, are mounted behind a cover at the front of
the unit.
Options
Protection
All options provide transformer over current protection
for phase to phase faults. Earth protection covering
phase to earth faults is also available if required.
Cable Boxes
Internal arc test cable boxes are available for IEC and
ENA specifications. Interlocked cable boxes are also
provided as options.
Automation
The MCR can be pre-wired for automation. Rotary
actuators can be easily and rapidly fitted on site whilst
the unit is in service no access is required to the internal
workings of the RMU.
Key features Compact one tank solution 12kV + 15kV versions Ergonomic mimic diagram Vacuum interrupters for all circuits Enhanced duty, in excess of IEC requirements Pre-wired for motor actuation Fault passage indicators Common stainless steel switching chamber Full ratings with zero atmospheric pressure
1
Fully interlocked test access cover
2
Removable and fully interlocked earthing point
3
Cable test terminals
4
Sealed tank
5
Disconnector
6
Vacuum interrupters
7
Internal arc vent
8
Protection CTs
9
Circuit breaker or ring switch operation
10
Circuit breaker or ring switch mechanism
11
Interlocking
12
Facia and mimic
13
Disconnector operation
14
Pressure gauge
15
Cable box interlocking
16
Cable termination
17
Cable box 6332 MCR Reprint May08.fh11 27/8/08 11:07 Page 2
DESIGN
The Lucy MCR is a non-extensible ring main unit comprising of
3 or 4 functions in one common tank. It comprises of up to 4
vacuum circuit breaker units or a combination of vacuum circuit
breakers and fault-make load break switches located in a stainless
steel enclosure. The unit is suitable for both indoor and outdoor
applications and can be used either as a freestanding unit or
installed in compact mini-substations.
Stainless Steel Enclosure
The switching enclosure is manufactured from stainless steel and
fabricated utilising automatic robot welding techniques to
produce the highest integrity housings.
Housing
The housing itself is fully treated; using zinc coated steel and
electrostatically applied oven cured paint, to resist weather and
pollution attacks. Units can be provided with a hinged,
weatherproof and lockable door. The unit can be modified to
allow for a variety of cable types and installations.
Circuit Breaker
The circuit breaker comprises of three vacuum interrupters, which
have a fault-make, fault-break rating. Opening of the circuit
breaker is achieved by manually operating the handle
or via one of the many protection options available.
Earthing of the outgoing cable, from the circuit breaker, is
achieved by the use of the circuit breaker in series with the
off-load disconnector/selector switch.
Ring Switches
There are two options for the fault-make load break
switches where required. Ring switches can be provided using
fully rated vacuum interrupters or utilising proven single break
3 position switches. Both designs provide ON, OFF and
EARTH functionality.
Design
The Lucy MCR constitutes a new approach by Lucy to Ring Main Units. The MCR is a panel
style unit designed for front entry cabling. The unit can be used for indoor or outdoor
application and is designed for long service life and virtually zero maintenance.
Operation
All operating positions and instructions are indicated on the
main panel at the front of the unit. Operation is by means of
manually independent mechanisms, which are mounted external
to the main enclosure.
Vacuum circuit breakers have two operating positions, ON or
OFF, with an off-load, interlocked selector allowing isolation
and earthing of the circuits.
Test Facilities
Fully interlocked test facilities are provided in accordance with
ENATS 41-36 Issue 2 and the very latest IEC requirements.
The MCR has integral ring switch cable and circuit breaker test
facilities as an option.
Interlocks
Positive safety interlocks are incorporated on all switch positions
to prevent mal-operation.
Padlocks
All switch and selector positions can be padlocked.
Transformer Protection
The circuit breaker enables the MCR to protect transformers
with ratings well in excess of those achievable with a HV fused
unit. Protection is achieved by the use of ring core current
transformers in combination with Time Limit Fuse links or a
protection relay. The ring core current transformers are mounted
around the bushings, external to the switching chamber, but
within the cladding of the unit. The Time Limit Fuses, or the
protection relay, are mounted behind a cover at the front of
the unit.
Options
Protection
All options provide transformer over current protection
for phase to phase faults. Earth protection covering
phase to earth faults is also available if required.
Cable Boxes
Internal arc test cable boxes are available for IEC and
ENA specifications. Interlocked cable boxes are also
provided as options.
Automation
The MCR can be pre-wired for automation. Rotary
actuators can be easily and rapidly fitted on site whilst
the unit is in service no access is required to the internal
workings of the RMU.
Key features Compact one tank solution 12kV + 15kV versions Ergonomic mimic diagram Vacuum interrupters for all circuits Enhanced duty, in excess of IEC requirements Pre-wired for motor actuation Fault passage indicators Common stain