Operation Manual ServoOne Supply Unit
47
ID no.: 1101.21B.6-00 Date: 04/2020
Mains connection conditions
So that the trouble-free operation of a ServoOne supply unit on the supply system
is ensured, there is a minimum requirement on the short circuit power on the mains
connection. The transition to the mains filter is defined as the mains connection.
The requirement is to be met to prevent degradations on the supply unit as well as
malfunctions in other devices that are connected in parallel to this mains connection and
to make possible a reliable operating state.
The term short circuit power is a theoretical value for an apparent power that occurs in
an electrical system if a short circuit is caused at a transition point.
ServoOne
supply unit
Short circuit
ratio Rsc
1)
Minimum requirements on the short circuit power
on the mains connection for trouble-free operation
SO84.040.S
(Sn = Pn = 26 kW)
30 ... 50
800 kVA ... 1300 kVA
SO84.076.S
(Sn = Pn = 50 kW)
1500 kVA ... 2500 kVA
SO84.115.S
(Sn = Pn = 75 kW)
2250 kVA ... 3750 kVA
SO84.170.S
(Sn = Pn = 110 kW)
3300 kVA ... 5500 kVA
SO84.375.S
(Sn = Pn = 250 kW)
30 ... 50
10000 kVA
SO84.540.S
(Sn = Pn = 360 kW)
10000 kVA
1) Rsc is defined as the short circuit ratio of the short circuit power (Sk) at the mains connection to the rated power (Sn) of the
ServoOne supply unit (Rsc = Sk/Sn).
Table 4.9 Mains connection conditions
Procedure:
1.
Define the cable cross-section according to local regulations and conditions.
Use shielded cables where necessary and as shown in the connection diagrams.
2.
Wire the supply unit to the mains supply as per connection diagram
For further information on the permissible connection cross-sections and torques,
see chap. A.3, chap. A.6 and chap. A.7.
For data on the components, see chap. A.7, p. 82 and following text.
Residual current device
Due to the leakage currents to be expected, the supply unit is not designed for usage
with a residual current device.
If local regulations nevertheless require the installation of a residual current device, the
following applies:
y
In the event of a fault the supply unit can generate DC fault currents without
a zero crossing. The supply unit is therefore only allowed to be operated
with RCDs
1)
of type B for AC fault currents, pulsating or smooth DC fault
currents. The RCD used must also be suitable for operation with inverters and
servocontrollers. RCMs
2)
can also be used for monitoring tasks.
1) Residual Current Device
2) Residual Current Monitor
Electrical installation
Summary of Contents for ServoOne Series
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Page 90: ...Operation Manual ServoOne Supply Unit 90 ID no 1101 21B 6 00 Date Date 04 2020 Glossary ...
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