Grounding; Altering The Transformer - HPS DH Serie Guía De Instalación, Operación Y Mantenimiento

DANGER
HAZARD OF ELECTRIC SHOCK, EXPLOSION OR
ARC FLASH
After installation of cables and connectors, a
minimum of 1" clearance must be maintained from
energized parts to all case parts.
Failure to install cables and connectors as per all
applicable codes and standards and the attached
guidelines will result in serious personal injury or
death and property damage.

Grounding

DANGER
HAZARD OF ELECTRIC SHOCK, EXPLOSION OR
ARC FLASH
Failure to properly ground the transformer as per all
applicable codes and standards will result in serious
personal injury or death.

Altering the Transformer

DANGER
HAZARD OF ELECTRIC SHOCK, EXPLOSION OR
ARC FLASH
Misapplication or misuse of this equipment may
result in serious personal injury or death and
property damage.
may still be coated with impregnation material and insulation.
To change taps, it is necessary to gently remove all
contaminants and insulation from the surface of the top and
bottom of the taps (eye-loop or lugs) by sanding the lugs to the
bare metal.
The surface of the tap lead should be clean and coated
subsequently with electrical compound on all non-plated
contacts between the jumper terminal and the tap. Assemble
jumpers to taps as per Appendix D (Drawing 1 for single
conductor eye-loops and tap lugs or Drawing 2 for double
conductor eye-loop taps).
The following table may be used as a guideline for
minimum clearances at altitudes not exceeding 1000 m (3300
ft.). Above 1000 m (3300 ft.) please consult factory.
Transformer
Voltage Class Clearance (mm)
1.2 KV
2.5 KV
5.0 KV
8.7 KV
15 KV
18 KV
25 KV
34.5 KV
Note: "Some specific component parts of a transformer may require
clearances different than those indicated above. For those exceptions,
you should comply with the instructions provided in the assembly
drawings or installation procedure."
All core and coil assemblies are solidly grounded to the
enclosure internally to ensure that all conductive metal parts
have the same potential.
To ensure the safety in operation, the transformer must
be properly grounded before energizing. Most transformers
have a main ground location identified accordingly. If a main
ground location is not provided, it is the responsibility of the
installing contractor to make and verify the necessary ground
connections.
This grounding should be in accordance with all national
and local electrical codes and standards.
The application of this equipment is the responsibility of the
customer or the customer's agent. Misapplication or misuse
may result in serious personal injury or death and/or property
damage.
Any modifications to this equipment need to meet the
applicable codes and standards and the individual performing
any modifications is responsible for meeting the performance
and safety requirements defined in these regulations. The
manufacturer is not liable for modifications performed on this
equipment.
Minimum Minimum
Clearance (in.)
25 1
51 2
102 4
135 5.3
203 8
254 10
305 12
406 16
IOMGDDI / September 2017
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