2 Requirements | 2.3 Mains Connection
ZEISS
Value
Main Power Plug
Country-specific connectors (200 - 240 V) 2-
pin (16 A) + PE
or
NEMA 5-15 (100 V - 125 V) 2-pin (15 A) + PE
Power consumption
max. 900 VA
Max. current
4.5 A at 230 V
9 A at 120 V
Accessories mains power
Standard local 230 V or 120 V mains socket
Circuit breaker type
Type C
MCB (Miniature Circuit Breaker) or
MCCB (Moulded Case Circuit Breaker) ac-
cording to IEC EN 60898
Leakage current (relevant for Residual Cur-
rent Device)
max. 4.5 mA at 230 V
max. 2.5 mA at 120 V
Protection class
IP20 (IEC 60529)
IEC earth class
Class 1 of IEC 61140
All chassis are connected to electrical earth
by the earth cable in the mains cable.
II
2.3.1 Overvoltage Category
The IEC defined the term Overvoltage Category (sometimes referred to as Installation Category) to
address transient voltages. Category IV devices can handle the largest transients relative to the
normal working voltage. Category I devices can handle only small transients.
Voltage transients are defined as short duration surges of electrical energy. Repeatable transients
are frequently caused by the operation of motors, generators, or the switching of reactive circuit
components. Random transients, on the other hand, are often caused by lightning and electro-
static discharge. Ensure that the possibility of transient voltages on the mains line are minimal to
prevent damage to the system.
Max. transient voltage in V
Nominal Voltage
(VAC)
Category I
Category II
Category III
50
330
500
800
100
500
800
1500
150
800
1500
2500
300
1500
2500
4000
600
2500
4000
6000
1000
4000
6000
8000
Tab. 1: IEC Definitions of tolerated Transient Voltages for each Overvoltage Category
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Installation Requirements ZEISS LSM 900 | en-US | Rev. 2 | 349500-8183-000