Drummond Clamps DRUGCLAMP G Clamps For Busbar Connections Instruction Manual
- June 13, 2024
- Drummond Clamps
Table of Contents
Clamps DRUGCLAMP G Clamps For Busbar Connections
Instruction Manual
DRUGCLAMP
FUSED G CLAMP TYPE
BUS BAR CONNECTOR
Instruction Manual
Clamps DRUGCLAMP G Clamps For Busbar Connections
GENERAL SAFETY INFORMATION: Always read before proceeding.
Warning
These instructions contain both information and warnings that are necessary
for the safe operation and maintenance of this product. It is recommended that
you read the instructions carefully and ensure that the contents are fully
understood. Failure to understand and to comply with the warnings and
instructions can result in serious injury, damage or even death.
In order to avoid the danger of electrical shock, it is important that proper
safety measures are taken when working with voltages exceeding 30V AC rms, 42V
AC peak or 60V DC.
This product must only be used by a competent person capable of interpreting
the results under the conditions and for the purposes for which it has been
constructed. Particular attention should be paid to the Warnings, Precautions
and Technical Specifications. Always check the unit is in good working order
before use and that there are no signs of damage to it. Do not use if damaged.
Where applicable other safety measures such as use of protective gloves,
goggles etc. should be employed.
Please keep these instructions for future reference. Updated instructions and
product information are available at: www.martindale-
electric.co.uk
REMEMBER: SAFETY IS NO ACCIDENT MEANING OF SYMBOLS:
| **** | Equipment complies with relevant EU Directives |
|---|---|
| **** | Equipment complies with relevant UK Conformity Assessed marking |
| End of life disposal of this equipment should bein accordance with relevant |
Directives
| Caution – risk of electric shock
| Caution – risk of danger & refer to instructions
CAT IV| Overvoltage Category IV (CAT IV) is for equipment at or near
the origin of the electrical supply including LV substation bus bars,
electricity tariff meters and primary overcurrent protection devices.
Thank you for buying one of our products. For safety and full understanding of its benefits please read this manual before use. Technical support is available from 01923 441717 and support@martindale- electric.co.uk.
INTRODUCTION
1.2 Description
The DRUMMOND G Clamp is a moulded insulated clamp-on connector designed to
provide a direct connection to a rigid rectangular bus bar.
The clamp-on facility eliminates the need to drill the bus bar.
The insulated materials reduce the risk to the installer.
To counter the effects of vibration, a spring-loaded contact pin ensures
consistent electrical contact force that is independent of the clamp screw
installed torque and a locking ring nut secures the clamp screw against
loosening.
Fluted grip features enable the clamping screw and locking ring nut to be
tightened by hand while wearing PPE insulated gloves. This eliminates the need
to use tools within the bus bar chamber.
A 4mm shrouded socket is provided in the fluted head of the moulded screw.
The connection is suitable for up to 10A continuous use at 600V AC, subject to
appropriate rating of the 4mm plug and lead.
The fluted screw head incorporates a finger guard to signify the limit of the
ACCESSIBLE area at the head of the screw.
PRODUCT SPECIFIC SAFETY INFORMATION
2.1 RISK ASSESSMENT
Warning
It must be noted that this G Clamp provides a direct electrical connection to
a bus bar.
The G Clamp does not contain any attenuation or impedance.
Therefore, a full risk assessment must be undertaken by the installer or
responsible body before any decision is made to install or manipulate the G
Clamp or the plug connection while the bus bar is HAZARDOUS LIVE.
Appropriate PPE must be worn unless the bus bar is known to be isolated from
all risk of hazardous voltages including the effects of capacitance,
inductance, switching transients or lightning strike.
The installer must adhere to the working practices issued by the responsible
body. Since these working practices and the conditions of use are outside the
control of Martindale Electric, no liability can be accepted for the outcome.
2.2 Further checks
Warning
Before use check the unit for cracks or any other damage. Make sure the unit
is free from dust, grease and moisture. Also check any associated leads. Do
not use if damaged.
Caution
Avoid severe mechanical shock or vibration and extreme temperature.
INSTALLATION
Warning
Refer to Risk Assessment at 2.1 before commencing installation.
The DRUMMOND G Clamp should be mounted on the top edge of the bus bar.
A location should be selected that allows easy access to hold the G Clamp
securely while the screw is being tightened. A suitable physical clearance is
required to allow for the 4mm plug connection. This will depend on the choice
of plug. A clearance of 35mm is required for a standard DRUMMOND 4mm fixed-
shroud plug. Note that other designs of 4mm plug might require considerably
more clearance. Moving elements of doors, hinges, door locking systems and
other covers must also be taken into account.
For withdrawal of fuse holder allow a further 75mm.
The bus bar surface should
be clean at the area of intended contact. If necessary, clean the bus bar
surface according to the instructions issued by the responsible body.
The G Clamp should be opened as far as necessary to engage fully over the edge
of the bus bar. Hold the G Clamp stable and tighten the M16 moulded screw
against the face of the bus bar to compress the spring-loaded brass contact.
The brass contact will be compressed into the screw until the end face of the
moulded screw touches the surface of the bus bar. Tighten the fluted head of
the moulded screw BY HAND a further 30 – 45 degrees. (Equivalent to ONE flute
MAXIMUM). DO NOT OVERTIGHTEN.
After tightening
the screw, tighten the fluted ring nut against the G Clamp body to lock the
screw. Tighten the fluted ring nut BY HAND a further 30 – 45 degrees after
first touches the G Clamp body, (ONE flute MAXIMUM).DO NOT OVERTIGHTEN.
Equipment leads must use
4mm plugs of appropriate rating for the installation.
Attach the equipment lead to the 4mm socket in the head of the screw.
Leads should be dressed and supported so that no forces act on the G Clamp or
the 4mm plug.
The G Clamp is intended to be a fixed connection.
In NORMAL use, after correct installation, the G Clamp is not intended to be
hand-held or hand-manipulated by the OPERATOR during measurements or tests.
After a suitably rated 4mm fixed-shroud plug has been connected to the 4mm
socket in the screw head, the area on the head side of the finger guard is
rated CATEGORY IV 600V and provides REINFORCED INSULATION against 8kV
transient impulse.
The area on the threaded side of the finger guard should be treated as
HAZARDOUS LIVE at all times.
MAINTENANCE
4.1 Fuse Replacement
The Fused Drummond G Clamp is supplied as standard with a 6.35 dia X 32mm,
600V, 0.5A, 50kA ceramic HRC rated fuse, but this may have been changed for a
different fuse rating at the time of initial installation.
A fuseholder body containing the fuse is housed inside the main screw of the
Fused G Clamp.
Disconnect 4mm plug from end of Fuseholder Body.
Unscrew fuseholder Body to access fuse according to the picture. The G Clamp
itself does not need to be disturbed.
Replace the fuse ONLY with the precise fuse specified for the installation.
Screw Fuseholder Body back into place.
Check security of G Clamp.
Apply suitable safety checks before re-connecting 4mm Plug, which will apply
power immediately to the installed wiring.
Spare fuses are available from Martindale Electric using order code FUSE500
(pack of 3).
Specification
GCLAMP/F Fused Drummond G Clamp
The Drummond G Clamp
makes connecting to bus bars straight forward. The clamp-on design eliminates
the need to drill bus bars and makes for a much safer reliable connection via
a standard 4 mm socket.
Ideal for connecting power monitoring and measuring equipment, the new colour
coded clamps make phase identification easy. The insulated materials reduce
the hazard to the operator and the spring loaded contact pin and locking ring
ensure reliable results throughout extended logging periods.
The G Clamp can be tightened by hand when wearing PPE gloves, eliminating the
need to use tools in the bus bar chamber.
They are available in Brown, Black and Grey. The standard fused version is
supplied with a replaceable 0.5A fuse within the clamping screw providing
protection at the source. Other fuse ratings are available on request.
Available individually and in 3 phase connection kit sets including a blue
unfused G clamp for the neutral connection which requires 25mm less clearance
in front of the bus bar.
Individual G clamps
DRUGCLAMP/F0.5/BK (Fused 0.5A Black)
DRUGCLAMP/F0.5/BR (Fused 0.5A Brown)
DRUGCLAMP/F0.5/GY (Fused 0.5A Grey)
Connection Kit 1
GCK/F/KIT1
Set of four G Clamps, black, brown, grey fused and blue unfused.
Connection Kit 2
GCK/F/KIT2
Set of four G clamps black, brown, grey fused and blue unfused with 4m heavy
duty colour coded CATIV test leads. The leads are terminated with 45 degree
4mm safety plugs at both ends.
ELECTRICAL SPECIFICATIONS
Applied electrical contact force: 40N +/- 5N
Maximum working voltage: 600V AC
Maximum working current: 10A
GENERAL SPECIFICATIONS
Temperature & Humidity:
Operating: -15°C to 60°C ≤ 80% R.H.
Storage: -15°C to 60°C ≤ 80% R.H.
Altitude: up to 2000m
Dimensions
Length behind bus bar: 12mm
Length in front of bus bar: 87mm (+ 35mm
as minimum allowance for 4mm plug)
Height above top of bus bar: 14mm
Width: 50mm for locking ring nut
Clearance: Required to withdraw fuse holder 75mm
Bus bar
Suitable for rectangular bus bar ONLY. Not
suitable for round conductor.
Minimum Bar width: 20mm
Minimum bar thickness: 4mm
Maximum bar thickness: 26mm
Materials
Nylon 66, reinforced with glass fibre
Brass contact pin
Safety
Conforms to BS EN 61010-031:2015.
Installation Overvoltage Rating CAT IV 600V
Pollution Degree: 2
IP rating: IP40 (with connector in mated position).
Fuse: 6.35 x 32mm 600V 0.5A HBC
For enhanced safety, the fuse is fully recessed inside the fuse holder until
the fuse holder is withdrawn.
RISK ASSESSMENT IS REQUIRED BEFORE INSTALLATION.
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Due to policy of continuous development, Martindale Electric reserves the
right to alter equipment specification and description outlined in this
document without prior notice.
No part of this document shall be deemed to be part of any contract for the
equipment unless specifically referred to as an inclusion within such
contract. © 2022 Martindale Electric Co. Ltd. Registered in England No.
3387451. LITGCF
Thorne S. Derrick
+44 (0) 191 410 4292
www.powerandcables.com