Local Hmi Smart Setup; Racking Mechanism; Control Power Requirements; Motor Characteristics And Data - Siemens SIERS 2.0 Instruction Manual

SIERS 2.0 Siemens Integrated Electrical Racking System Instruction Manual
SECTION 2
2.0 Local HMI Setup

2.1 Racking Mechanism

The SIERS 2.0 Local HMI Smart Setup is arranged
with the stepper motor integrated fixed mounted in
the racking mechanism inside each circuit breaker
or auxiliary truck (i.e., removable elements)
located in the upper or lower compartment in the
switchgear lineup (see Figure 2). SIERS enables
racking the circuit breaker to the DISCONNECT, TEST,
and CONNECT positions, and auxiliary truck to the
DISCONNECT and CONNECT positions.

2.2 Control Power Requirements

SIERS 2.0 controls will operate on either or 125 - 250
Vdc control power, whichever is available in your
switchgear. If power source is not available in the
switchgear, SIERS can be plugged into 120 VAC
power outlet. See Figure 20 for where to plug 120
VAC power outlet.

2.3 Motor Characteristics and Data

The 60 VDC stepper motor is integrated in the
racking mechanism assembly with the following
characteristics.
Table 4: Motor Characteristics
Voltage (V) I nominal (A)
60 3.0
60 sec for 27kV

2.4 Operational Interlocks

Operational interlocks are programmed in the logic
CPU and displayed on the HMI touchscreen
interface.
Interlock and operation of removable elements
There are only 3 interlock permissive circuits wired
for every circuit breaker compartment, and 2
interlock permissive circuits for each auxiliary truck
compartment.
16
Racking
I max (A) time (s)
6.0 40
1. Normally open circuit breaker auxiliary switch
contact (52a switch on circuit breaker) wired into
the controller circuit. Note: 52a switch applicable
for circuit breaker, not auxiliary truck or ground
and test devices.
If the circuit breaker is closed (this can occur only
in the TEST and CONNECT positions), the auxiliary
switch circuit will close, and the motor will
receive no power.
2. The manual racking permissive switch (LS4
limit switch) is actuated when the manual
racking crank is inserted. When the LS4 switch
is actuated, electric racking is disabled (see
Figure 15).
3. Normally open contact installed on the compart-
ment to sense door position. If the circuit breaker
compartment door is open, the LM blocks power
through the permissive switch (LS5) to the
racking motor. The compartment door must be
closed to enable integrated electrical racking
(see Figures 16 and 17).