Siemens SDV7-AR Instruction Manual Download

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Standard construction details of the
magnetic-actuator operating mechanism of
the circuit breaker are detailed in the type
3AH35-MA magnetic-actuator operator
instruction manual E50001-F710-K378-X-
XXXX.

Special mechanical and electrical devices,
furnished in accordance with purchase order
requirements, are covered by supplementary
instructions submitted with this instruction
manual.

The equipment furnished has been designed
to operate in a system having the circuit
capacity specified by the purchaser. If for any
reason the equipment is used in a different
system or if the short-circuit capacity of the
system is increased, the ratings of the
equipment, including the momentary rating
and the interrupting capacity of the type
SDV7-AR distribution circuit breaker must be
checked. Failure on the part of the user to
receive approval of intended changes from
Siemens may cause the warranty to be void.

This instruction manual applies to the type
SDV7-AR distribution circuit breaker enclosure
structure.

Refer to instruction manual E50001-F710-
K376-X-XXXX for instructions applicable to
the type3AH35-SE stored-energy operator.

Refer to instruction manual E50001-F710-
K378-X-XXXX for instructions applicable to
the type 3AH35-MA magnetic-actuator
operator.

General description

The distribution circuit breaker described in
this instruction manual is of the ac high-
voltage outdoor circuit breaker type, as
defined in ANSI/IEEE C37 and NEMA SG4
standards. All high-voltage parts excluding
roof bushings are completely enclosed within
grounded barriers. The secondary control
devices and primary circuits are isolated from
each other by barriers.

Siemens type SDV7-AR distribution circuit
breakers carry a type designation, as shown
in Table 1: Type SDV7-AR distribution circuit
breaker designations. This designation may
appear on drawings and familiarity with them
will simplify communications with the
factory.

In this instruction manual, reference to type
SDV7-AR distribution circuit breaker is used
when the text applies to the circuit breaker
with either type of operating mechanism.
When relevant to the type of operator, the
type SDV7-SE-AR (stored-energy) or type
SDV7-MA-AR (magnetic-actuator)
designations are used.

Additionally, this equipment is classified as
arc-resistant, as defined in ANSI/IEEE
C37.20.7, and has been qualified to carry a
type 2B accessibility rating. The arc-resistant
features are intended to provide an additional
degree of protection to personnel in close
proximity to the equipment in the event of an
internal arcing fault while the equipment is
operating under normal conditions.

Normal conditions include the “usual service
conditions” defined in ANSI/IEEE C37.04,
clause 4 and ANSI/IEEE C37.010, clause 4, as
well as the following conditions intended to
maintain the integrity of the equipment
during an internal arcing fault event:

1. All doors and panels providing access to

primary compartments must be closed
and properly secured (All bolts installed
and tightened. All latches in latched
position.)

2. All pressure relief devices must be free to

operate as designed.

3. The fault energy available to the

equipment must not exceed the internal
arcing short-circuit current rating and
rated arcing duration of the equipment.

4. There must be no obstructions around the

equipment that could direct the arcing
exhaust products into an area intended to
be protected.

5. The equipment must be properly

grounded.

6. All equipment must be properly installed

in accordance with information in
instruction manuals and drawings.