Current And Voltage Transformers; Classification Of The Switchgear - Siemens 8DJH Installation And Operating Instructions Manual

4.5 Current and voltage transformers

4.6 Classification of the switchgear

500-8384.9 • Version 11 • Installation and Operating Instructions • 8DJH
▪ C.t.-operated release (‑Y6)
The low-energy c.t.-operated release 3AX1104 is used for protection devices with a pulse
output, which are supplied with c.t. current. The tripping circuit is supplied as well through
the protection core of the current transformer. When a pulse of 0.1 Ws runs through the
tripping circuit, the opening operation takes place.
▪ Low-energy release (‑Y6)
The low-energy release (-Y6) is provided for use in combination with the transformer
monitor IKI-30 (make Kries) or the protection device 7SJ45 (make Siemens) supplied with
c.t. current. The tripping circuit is supplied through the current sensor or current
transformer. When a pulse of 0.02 Ws runs through the tripping circuit, the opening
operation takes place. The low-energy release is available for the vacuum circuit-breaker
type 2.
Varistor module
The varistor module limits switching overvoltages caused by tripping coils in circuits and
auxiliary circuits.
The varistor module is integrated in the releases.
Circuit-breaker tripping signal
When the circuit-breaker is tripped by a release (e.g. by protection tripping), there is a signal
through the NO contact -S6.
If the circuit-breaker is tripped deliberately with the mechanical pushbutton, this signal is
suppressed by the NC contact -S7.
Tab. 27: Power consumption of the releases
Release
Closing solenoid (‑Y9)
Shunt release (‑Y1)
Shunt release (‑Y2)
C.t.-operated release (‑Y4)
C.t.-operated release (‑Y6)
Low-energy release (‑Y6)
Undervoltage release (‑Y7)
The technical data of the current transformers and the voltage transformers is given in the
associated order documents.
The switchgear is classified according to IEC/EN 62271-200 / VDE 0671-200.
Partition class: PM (metallic partition)
Tab. 28: Loss of service continuity category
Panel
with ▪ Three-position disconnector
▪ Three-position switch-disconnector
without
Tab. 29: Accessibility to compartments
Compartment (enclosure)
Busbar compartment
Switching-device compartment
Low-voltage compartment (option)
Connection compartment for panel
Power consumption [W/VA]
Circuit-breaker type 1.1
≤ 440
≤ 440
≤ 60 W ≤ 100 VA
≤ 20
≤ 20
—
≤ 20
Loss of service continuity category
LSC 2
LSC 1
With earthing switch
Cable feeder (K)
Metering panel type M, air-insulated Tool-based
Technical data | 4
Circuit-breaker type 2
≤ 370
≤ 370
—
—
≤ 30
≤ 10
≤ 20
Accessibility
Non-accessible
Non-accessible
Tool-based
Interlock-controlled
Tool-based
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