Alliance Laundry Systems CHM1772C manual Input Power Conditioning

Installation

Input Power Conditioning

The drive is suitable for direct connection to input power within the rated voltage of the drive. Listed in Table 9 are certain input power conditions which may cause component damage or reduction in product life. If any of the conditions exist, as described in Table 9, install one of the devices listed under the heading Corrective Action on the line side of the drive.

IMPORTANT: Only one device per branch circuit is required. It should be mounted closest to the branch and sized to handle the total current of the branch circuit.

Input Power Condition		Corrective Action
Low Line impedance (less than 1% line reactance)	∙	Install Line Reactor
	∙	or Isolation Transformer
Greater than 120 kVA supply transformer
Line has power factor correction capacitors	∙	Install Line Reactor
	∙	or Isolation Transformer
Line has frequent power interruptions
Line has intermittent noise spikes in excess of 6000V (lightning)
Phase to ground voltage exceeds 125% of normal line to line voltage	∙	Remove MOV jumper to ground.
	∙ or Install Isolation Transformer with grounded
Ungrounded distribution system
		secondary if necessary
240V open delta configuration (stinger leg)*	∙	Install Line Reactor

*For drives applied on an open delta with a middle phase grounded neutral system, the phase opposite the phase that is tapped in the middle to the neutral or earth is referred to as the “stinger leg,” “high leg,” “red leg,” etc. This leg should be identified throughout the system with red or orange tape on the wire at each connection point. The stinger leg should be connected to the center Phase B on the reactor.

Table 9

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