Download moulded case circuit breakers 1600 to 3200a spec

Specification for Tender
840951443
Specification for Moulded Case Circuit
Breakers from 1600 to 3200 A
General
Construction and operation
Protection functions of the control unit
Last update :2017-04-29
-1-
Specification for Tender
840951443
Table of contents:
1. General …..………………………………………………………………………………………….. p. 3
2. Construction and operation ..................……………..................................………………………... p. 3
3. Protection functions of the control unit …………………………………………………………… p. 3
3.1 General................................................................................................................................................. p. 3
3.2 Characteristics...................................................................................................................................... p. 4
3.3 Control and monitoring functions......................................................................................................... P. 4
These additional chapters correspond to specific needs
3.4 Communication.................................................................................................................................... p. 4
3.5 End-of-life............................................................................................................................................ p. 4
Last update :2017-04-29
-2-
Specification for Tender
840951443
1. General
1.1 The high-current moulded-case circuit breakers shall comply with the general rules of IEC 60947-1 and
2 or standards derived from the latter (VDE 0660 ; BS4752 ; UTE 63120 ). Versions complying with UL
489 shall also be available.
1.2 The high-current moulded-case circuit breakers shall belong to category B as defined in the general rules
mentioned above. Certificates attesting to compliance with these rules shall be established taking into
account the following performance levels for the test sequences: service breaking capacity (Ics) equal to at
least 75% of the rated ultimate breaking capacity (Icu) and a rated short-time withstand current (Icw) of 30
kA / 0.5 s.
1.3 The rated ultimate breaking capacity (Icu) of each high-current moulded-case circuit breaker shall be
equal to at least the value of the short-circuit current (Isc) at the point of installation on the electric circuit,
unless the upstream circuit breaker makes it possible to ensure coordination (as defined in Appendix A of
IEC 60947-2); in this case, the coordination between the two circuit breakers shall be confirmed and
guaranteed by tests.
1.4 The high-current moulded-case circuit breakers shall have a rated operational voltage of 690V AC
(50/60Hz).
1.5 The high-current moulded-case circuit breakers shall have a rated insulation voltage of 750V AC
(50/60Hz).
1.6 The high-current moulded-case circuit breakers shall be available in switch-disconnector versions.
1.7 The high-current moulded-case circuit breakers shall be suitable for reverse feed without any reduction
in performance up to 500 V CA.
1.8 The high-current moulded-case circuit breakers shall be available in 3-pole or 4-pole (neutral protection)
versions. On 4-pole circuit breakers, a 3-position switch shall be provided to set neutral protection to any of
the following levels: unprotected neutral (4P3D), half-protected neutral (4P3D+N/2) or fully protected
neutral (4P4D).
2. Construction and operation
2.1 The operating mechanism of the moulded-case circuit breakers shall be of the fast make and fast break
type. Tripping on a fault shall be mechanically independent of the operating handle. The operating
mechanism shall be designed to operate all poles of the circuit breaker simultaneously for making, breaking
and tripping.
2.2 The moulded-case circuit breakers shall be actuated by a handle that clearly indicates the three
fundamental positions: ON, OFF and TRIPPED.
2.3 The operating mechanism shall be designed in such a way that the position of the operating handle of the
circuit breaker indicates the real position of the main contacts.
2.4 The high-current moulded-case circuit breakers shall be designed to allow locking in OFF (open)
position (if required) by keylocks or padlocks.
3. Protection functions of the control unit
3.1 General
3.1.1 The protection functions shall be provided by a control unit powered by a transformer located within
the case. The operation of the tripping mechanism shall require no external power source.
3.1.2 The control unit shall be interchangeable on site for adaptation to changes in the installation.
3.1.3 Sensors shall be of the non-magnetic or Rogowsky type for accurate current measurements. The
control unit shall measure the true rms value of the current.
Last update :2017-04-29
-3-
Specification for Tender
840951443
3.2 Characteristics
3.2.1 Long-time protection with an adjustable current setting and time delay.
3.2.2 Short-time protection with an adjustable pick-up and time delay.
3.2.3 Instantaneous protection adjustable up to 15 times the rated current with an OFF position.
3.2.4 Earth-fault protection (if required) with an adjustable pick-up and time delay.
3.3 Control and monitoring functions
The following control and monitoring functions shall be built into the control units:
3.3.1 Load monitoring
A LED shall indicate the load level - above 105% load (with respect to the long-time setting), a yellow LED
shall be illuminated.
3.3.2 Testing
A test connector shall be provided on the control unit to allow complete testing by an external test unit.
3.3.3 Thermal memory
The control unit shall optimise protection of downstream cables and equipment in the event of repeated
overloads or earth faults by storing the temperature-rise data in memory
These additional chapters correspond to specific needs
3.4 Communication
3.4.1 The circuit breaker shall be capable of communicating the following data via a bus:
- Circuit-breaker status (open/closed, connected/disconnected/test, tripped on a fault, ready to close)
- Control-unit settings
- Tripping causes
- The measurements processed by the control unit
3.4.2 Communications functions shall be independent of the control unit.
3.5 End-of-life
Environmental considerations and processing of materials at end of service life.
The manufacturer shall provide instructions on the removal, dismantling and processing of circuit-breaker
materials at the end of service life.
Last update :2017-04-29
-4-