Danfoss Electronically controlled PTC Starting Device Installation guide

Technical Info

Electronically controlled PTC Starting Device

ePTC - Product Description

Introduction

Theasynchronousmotorofasingle phase AC powered compressor has two windings, a main and an auxiliary winding. The auxiliary winding is powered high at start by means of a starting device, then powered down, often still utilized continuously by means of a run capacitor.Thestartingdeviceofour standard PTC-starters is a “Positive Temperature Coe cient” resistor, PTC. When heated up during the start phase, the PTC almost cuts o the current to the auxiliary winding, leaving only enough current to keep itself heated to this closing level.The heat loss for this amount to approximately 2.5 W. With the ePTCthislosscanbereduceddown to approximately 0.4W by an extra electronic circuit.

Features

Theelectronicdesignofthestaring device o ers some strong features such as:

•Restart of compressor possible after a few seconds. Only very short cooling time necessary, due to the electronic design.

•Operational wattage loss reduced by 2Watt.

Dimensions

<![if ! IE]>

<![endif]>48.5

<![if ! IE]>

<![endif]>8556

37 27.9

Identification

Code number 103N0050

FunctionalDescription

ThemaincomponentoftheePTCis the same PTC pill like in other 220240V103N….DanfossPTCstarters. Thus the start of the compressor motor is performed in the same way. In standard PTC starters the >2 W energy loss to keep the PTC heated during compressor operationarenotavoidable.IntheePTC a small electronic circuit cuts o the current through the PTC short time after start and thus reduces the energy loss down to approx 0.4W.The switch used is aTriac, an electronic AC switch, controlled by a timer circuit.

As the timer circuit has a short reset time and the main PTC cools downduringcompressoroperation already, the full start torque will be available after approx 6 s compressor o time. However, it is still a LST starting device, needing full pressure equalization before start.

Min.On/O time of compressor

ON

OFF

Approx. 6 s

Minimum 120 s

REFRIGERATION AND AIR CONDITIONING

Wiringdiagram

	T	Thermostat			N	S
			Compressor
L		C
	Screw	Spade	Internal		N	L
	terminal	terminal	protector
Supply voltage			<![if ! IE]> <![endif]>Main winding	<![if ! IE]> <![endif]>Auxiliary winding		C
					Front
220-240 VAC
50 / 60 HZ
N	Internal connection	N	ePTC	S	S	C M
	Screw	Spade	Electronic PCB	Spade
	terminal	terminal		terminal
					Rear side 8558
			with X2-Cap (optional)
			Run capacitor (optional)	8557-2

ePTC with X2-Cap

Connections&Terminals

The wiring diagram shows how to make the connections. The two screw terminals marked N and L are for supply voltage. The spade on the L terminal and the spade marked C are for the thermostat.The spade marked S at the top right position is internally connected to the Start (or auxilary) fusite terminal. This spade together with N is used for a run capacitor.The spademarkedNatthetopleftpositionisinternally connected to the Neutral screw terminal. The spade marked C at the bottom position is internally connected to the Common fusite terminal. On the rear side of the ePTC starter there are three holes. The hole in the bottom is for the Common fusite terminal on the compressor. The top left hole is for the Start fusite terminal and the top right hole is for the Main fusite terminal. The ePTC starter is mounted with the C spade downwards.

ePTCwith X2-Cap for special Applications

For applications using a mechanical thermostat it can be neccessary to use the ePTC with integrated filter,type X2-Cap.

Technicaldata

	Code number	Standard:	103N0050
		with X2-Cap:	103N0060
	Nominal supply voltage	220 - 240V 50/60 Hz
	Min. supply voltage	187V
	Max. supply voltage	254V
	Power consumption	approx. 0.4W (after 2 s)
	Spade connectors	4.8 mm
	Cables	Temperature resistant up to min. +60°C
	Run Capacitor	Optional
	Thermostats	Mechanical or electronic
	Ambient temperatures	During operation from 0°C to 50°C
		During transport from -20°C to 70°C
	Enclosure	IP 00
	PTC protection screen	Not needed (surface temp. < 82°C)
	Approvals	EN 60730-1, DEMKO
	Radiation	EN 55014-1/EN 61000-3-2/EN 61000-3-3
	Immunity	EN 50014-2
	Declarations	CE

Danfoss can accept no responsibility for possible errors in catalogues, brochures and other printed material. Danfoss reserves the right to alter its products without notice.This also applies to products already on order provided that such alterations can be made without subsequential changes being necessary in specifications already agreed.

All trademarks in this material are property of the respective companies. Danfoss and the Danfoss logotype are trademarks of Danfoss A/S. All rights reserved.

DanfossCompressorsGmbH

Mads-Clausen-Str. 7 D-24939 Flensburg / Germany compressors.danfoss.com

DEHC.EI.200.B2.02/520N0192 Produced by Danfoss Compressors, DEHC6093, 08.2005