PWR
KMB systems
1. Basic features
Main advantage of PWR power supplies are high over-voltage category (300V/CAT IV) and wide range of
supply voltage. PWR 1 unit can be powered using single phase AC or DC voltage and PWR 3 using
three phase AC voltage.
Power supply features indication of input voltage and protection against over-voltage. Even under over-
voltage conditions power supply can be operated with limited output power. (see chapters bellow)
PWR have galvanically isolated SELV output. Multiple power supplies can be connected as follows:
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parallel: 2× higher output current, more then 2 of same type can be connected (consult with KMB)
•
parallel: redundant connection with benefit of higher reliability
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serial: 2× higher output voltage
•
serial with central tap: result is power supply with symmetrical output voltage (+/-)
Power supplies have U-I characteristic – from voltage stabilisation smoothly transfers to current limitation
(limitation of maximal output current).
Internal over-voltage protection of input and output is implemented. Short-circuit protection, overload and
load disconnection protection is matter of course.
Operation of the PWR unit and status of external accu. is signalled by LED and SSR output.
Supplies with external accu. Have protection against wrong connection of the accumulator and against
total discharge of accumulator.
Cooling is provided by natural flow of the air. Fan-less.
2. Safety instructions
Danger of electric shock! Do not open the device.
Follow the operating instructions.
•
Keep the operating instructions together with the device.
•
Ensure that the device works only in perfect and original condition, in the upright position.
•
Leave enough space (at least 50mm) for airflow below and above the device.
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Do not place heat sources under the unit!
•
Do not use the device in an explosive areas.
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Ensure that only qualified persons operate the unit
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Only connections in this manual is permitted
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Only connect recommended external batteries or contact the manufacturer.
•
Ensure that the device is not operating outside the limits. See technical data.
•
Clean the machine only with a dry cloth or brush so that air vents remain clean.
If the device is used in a manner other than that specified by the manufacturer, the device protection
may be compromised.
Device may be repaired only by the manufacturer or its authorized service organization.
3. Risk assessment (ČSN EN 61010-1)
Requirements:
The dielectric strength to be met is 300V CAT IV. This corresponds to a test voltage of 5.4 kV ~ (5 s)
resp. 3kV ~ (1min) for reinforced insulation according to ČSN EN 61010-1.
Power Module Features:
Insulation voltage is 3kV ~ (1min), overvoltage category is 300V CAT II.
Operational risk without further action:
2
