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W Series Data Sheet
?
125, 250 Watt AC-DC and DC-DC DIN-Rail Converters
10074
1
3
2
Fig. 19
Cage clamp terminals. Use 0.5 to 2.5 mm 2 (AWG 20 to 12)
solid or stranded wires depending on local requirements.
The phase input (L or Vi+) is internally fused; see Input
Fuse . This fuse is designed to break an overcurrent in case of
a malfunction of the converter and is not customer-
accessible.
External fuses in the wiring to one or both input lines (L and/
or N ) may be necessary to ensure compliance with local
requirements. A built-in second fuse in the neutral path is
available as option F.
A second fuse in the wiring to the neutral terminal N or option
F is needed if:
? Local requirements demand an individual fuse in each
source line
? Neutral and earth impedance is high or undefined
? Phase and neutral of the mains are not defined or cannot be
assigned to the corresponding terminals (L to phase and
N to neutral).
Models with Option F: Caution! Double-pole/neutral fusing.
If the converters operate at source voltages above 250 VDC,
an external fuse or a circuit breaker at system level should be
installed.
Caution:
? Installation must strictly follow the national safety regulations.
? Do not open this apparatus!
Protection Degree
The protection degree of the converters is IP 20. Protective
covers over input and output terminals are available on
request; see Accessories .
Cleaning Liquids
Any penetration of liquid or foreign solid objects is to be
prevented, since the converters are not hermetically sealed.
Standards and Approvals
The converters of the LW Series with feature E were safety-
approved to EC/EN 60950-1 and UL/CSA 60950-1 2 nd Ed.
(models without E: IEC/EN 60950), IEC 61010-1:C11:2002
(models without E: IEC 61010-1), and EN 50178:1997 (with
and without E).
The converters are UL508-listed components.
The EW models are safety-approved to IEC/EN 60950-1 and
UL/CSA 60950-1 2 nd Ed.
The converters have been designed in accordance with said
standards for:
? Class I equipment
? Power supply for building-in, vertical mounting on 35 mm
DIN-rail or on a wall
? Overvoltage category II (III for 110 VAC supply)
? Basic insulation between input and case, based on
250 VAC
? Double or reinforced insulation between input and output,
based on 250 VAC and 350 VDC.
? Functional insulation between outputs and case.
? Functional insulation between outputs.
? Pollution degree 3 environment (AC-input) and degree 2
(DC input).
The converters are subject to manufacturing surveillance in
accordance with the above mentioned standards and with
ISO9001:2000.
Operation at Frequencies Greater 60 Hz
The LW Series converters have been tested for operation up
to 440 Hz. However, the Y and X caps are not approved to such
frequency. The leakage currents are higher than at 60 Hz,
whereas the output ripple voltage is lower.
Leakage Currents with AC Supply
Leakage currents flow due to internal leakage capacitance
and RFI suppression Y-capacitors. The current values are
proportional to the mains voltage and nearly proportional to
the mains frequency. They are specified at maximum
operating input voltage where phase, neutral, and protective
earth are correctly connected as required for class I
equipment.
Leakage current may exceed 3.5 mA, if f i > 63 Hz.
Railway Applications
The W Series converters have been designed observing the
railway standards EN 50155 and EN 50121. All boards are
coated with a protective lacquer.
The EW Series is particularily suitable for connection to 110 V
railway batteries.
BCD20020-G Rev AC, 31-Jan-2013
Page 19 of 25
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