9
Technical Data
MN019001EN
Effective November 2015
Bussmann series
PV Combiner box
EATON
www.eaton.com
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DANGER!
Safety Instructions
Electric shock
Eaton’s Bussmann series combiner box operates at extremely high
voltages and its internal components are live. Whilst every effort
has been made to ensure the internals are completely shielded
and IP20 touch safe, work must only be carried out on the
combiner box if the switch disconnect is in the OFF position and
the combiner box is no longer under load. Even then work must
only be carried out by an electrically skilled person. Please be
aware that during daylight hours, even whilst disconnected from
load, 1000VDC potential may be present within the combiner box.
Operating a damaged combiner box may cause fatal injury from
electric shock.
•
Ensure the combiner box receives regular maintenance.
•
Ensure that any safety equipment is accessible at all times,
ensure that it is in good working condition on a regular basis.
In the event of a ground fault, assume that grounded PV plants
are still live. Ensure no voltage is present before touching the
combiner box components.
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CAUTION!
Burn hazards
The combiner box and its components can become hot during
operation.
•
Please ensure personal safety protection is worn at all times
when working on the combiner box.
NOTICE
Damage to the Eaton’s Bussmann series combiner box
To ensure that the combiner box is not damaged by untrained
personnel:
•
Ensure the combiner box is locked and the keys removed and
stored in a safe place.
Electrostatic discharge
Electrostatic discharge can destroy the sensitive electronic compo-
nents within the Eaton’s Bussmann series combiner box.
•
Observation of the ESD safety regulations and wearing protec-
tive gloves will prevent damage.
•
Conduct any electrostatic charges away from the electronic
components before touching them. This is done by touching the
unpainted, grounded parts of the enclosure.
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WARNING!
Product warning labels
Hazard and warning labels are applied internally and externally to
the combiner box. On the outside of the combiner box, a vinyl
or sticky back ‘Danger – High Voltage’ label is applied. Internally,
labels are used to state the hazard presented by the live parts
of the combiner box. This label is highly visible on all shrouding
within the combiner box.
The word ‘Danger’ is defined as a “hazardous situation which, if
not avoided, will result in death or serious injury.” This indicates
the level of hazard which could be encountered, should the main-
tenance engineer fail to adhere to these warnings. These labels
are typically applied to areas which are IP20 “touch safe”, but also
experience high voltages and currents. Failure to adhere to these
warnings could therefore result in death or serious injury.
Example warning labels
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DANGER!
Service and maintenance
During any service or maintenance of the Eaton’s Bussmann
series combiner box all safety instructions, notices, and warning
labels must be observed and followed at all times. Any work
carried out must only be carried out by an electrically skilled
person, following local laws and regulations. As a minimum the
following steps should be followed:
1. Where present the combiner box switch disconnector should be in the OFF
position.
2. If no combiner box switch disconnector is present then steps must be taken
to safely isolate the combiner box from any system load. Ensure all system
switch disconnectors are in the OFF position. Ensure the inverter or inverters
are ether off or isolated from the combiner box.
3. Follow all necessary ‘Tag out, Lock out’ safety procedures.
4. DO NOT OPEN FUSE HOLDERS UNDER LOAD.
5. Use appropriate and calibrated test equipment to safely ensure current is
zero and confirm the combiner box is fully isolated from any system load.
6. ONLY when the combiner box is 100% isolated can the fuse holders be
opened.
7. Open ALL fuse holders to remove voltage potential from within the combiner
box.
8. Complete any maintenance or service continuing to observe all safety
instructions, notices and warning labels.
9. Do not remove or alter any safety covers installed within the combiner box.
10. ONLY when any maintenance or service is complete and ensuring the
combiner box is still 100% isolated can the fuse holders be closed.
11. Follow all necessary ‘Tag out, Lock out’, safety procedures and system
re-energisation procedures before re-connecting the combiner box to the
system load.
12. Finally ensure all safety covers, doors and locks are closed and secure.
