Руководство по эксплуатации Delta MS300 (EN)

Devices and special tools/equipment N/A Test setup N/A 1 of 10 Product AMD Type/Series MS300 Appl. Note Nr. MS300 PTC Issued by DEN Author Arnoud de Bok Release Date March 8, 2017 Title PTC FUNCTION FOR DELTA MS300

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CONTENTS: 1 GENERAL ..................................................................................... 3 1.1 PTC for motor temperature protection ........................................................................................ 3 1.2 Standards .................................................................................................................................... 3 1.3 Motor layout ................................................................................................................................ 3 1.4 PTC characteristic .......................................................................................................................

3 1.4.1 Definitions .................................................................................................................................................................... 4 1.4.2 PTC curve .................................................................................................................................................................... 4 1.4.3 PTC switching level ......................................................................................................................................................

4 1.4.4 PTC input ..................................................................................................................................................................... 4 2 MS300 PARAMETERS AND WIRING ............................................... 5 2.1 PTC wiring and connection ......................................................................................................... 5 2.1.1 Recommendations and limitations ................................................................................................................................ 5 2.2 Parameters for PTC-function: Pr06.29  Pr06.30 and Pr03-00, Pr03-15 ...................................

5 3 DIMENSIONING ............................................................................. 6 3.1 Connection diagram .................................................................................................................... 6 3.2 General formula .......................................................................................................................... 6 3.3 Dimensioning R 1 ......................................................................................................................... 6 3.4 Conditions for R 1 .........................................................................................................................

6 3.5 R 1 value ....................................................................................................................................... 7 3.6 Conditions for PTC Level ............................................................................................................ 7 3.7 PTC Level Pr06-30 ..................................................................................................................... 8 3.8 Reset ...........................................................................................................................................

8 3.9 Summary ..................................................................................................................................... 8 3.9.1 Circuit & wiring ............................................................................................................................................................. 8 3.9.2 Parameter settings ....................................................................................................................................................... 9 4 CLIXON ......................................................................................

10 4.1 Wiring for and connection of clixon ........................................................................................... 10 4.1.1 Parameter settings ..................................................................................................................................................... 10 2 of 10

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1 GENERAL 1.1 PTC for motor temperature protection To protect motors from overheating, PTCs (also called thermistors) are incorporated in the motor windings. At the pre-defined temperature the PTC’s resistance suddenly increases. This can be measured. Especially when motors are used for long periods of time at low speeds, the cooling could be insufficient. In that case the motor can be equipped with optional PTCs (ask the motor manufacturer). 1.2 Standards PTCs for motor protection are manufactured acc. to the standards DIN44081 (for single PTCs) and DIN44082 (for 3 PTCs in series).

1.3 Motor layout A typical layout of the PTCs in a motor is as follows, whereby the 3 PTCs are connected in series. (In case of 6 PTCs in series, each winding incorporates 2 PTCs in series.) 1.4 PTC characteristic The characteristics of 1, 3 or 6 PTCs is shown below. 6 PTCs Resistance in  3 PTCs 1 PTC Temperature in  C 3 of 10

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1.4.1 Definitions NAT Normal Excitation Temperature (German abbreviation) PTCs are manufactured to switch at a certain temperature, called “NAT”. 1.4.2 PTC curve The PTC curve for a single PTC is defined as follows: 1.4.3 PTC switching level 1 PTC switches between [NAT+5  C] and [NAT+15  C] 3 PTCs in series switch between [NAT-5  C] and [NAT+5  C] 6 PTCs in series switch between [NAT-20  C] and [NAT] As a user of AC Motor Drives, you don’t have to worry about the value of NAT, this has been taken care of by the motor manufacturer. The standardisation of PTCs ensures they switch at pre-defined resistance levels. 1.4.4 PTC input A PTC-input should have the following functionality:

R PTC  : may not switch 1650  PTC  : switch R PTC >4000  : must have switched 4 of 10 Temperature range Resistance Measuring voltage -20C to NAT-20C 250 2.5V NAT-5C 550 2.5V NAT+5C 1330 2.5V NAT+15C 4000 7.5V

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