Assistance required Crompton Parkinson Single pHase

[Fergal_Hatt]

HI All,

Hoping you can help me. I have no idea how to wire up this Crompton PArkinson motor (forward or reverse) and was wondering if anyone could guide me by looking at the attached pictures.

 

[Fergal_Hatt]

See Picture attached of model plate

 

[itsmoked]

Read these:
thread237-474053
thread237-468802
thread237-468345
thread237-457177
thread237-447359
thread237-429490





Keith Cress
kcress -

http://www.flaminsystems.com

 

[waross]

From the nameplate photo, that may be either a single phase or three phase.
The terminals look as if they may be three phase.
A single phase, single voltage motor typically has four leads, not six.

Bill
--------------------
"Why not the best?"
Jimmy Carter

 

[che12345]

Dear All,
Q. " ...how to wire up this ... motor (forward or reverse) .... could guide me by looking at the attached pictures.
A1. Based on:
a) the name of the manufacturer,
b) picture 1. There are 3 terminals (Z) ,(AZ), [A?]. Markings (K), (S), (T) are not in use,
c) picture 2. W_o 250 [W?] [Hp?],
Volts 200/220 ; Amps 3.1 ; Hz 50 ; Phase [1?],
d) wattage? or Hp? 250; Voltage 200/220; Amp 3.1; it is unlikely to be a 3-phase motor.
It could? be a [single-phase split-phase motor] with (internal centrifugal switch in series with the start winding); but [without any starting capacitor].
A2. I will answer [to Mr. Fergal Hatt] further detail on i) motor internal circuitry , ii) connection for a [fixed] forward or reverse direction of rotation, iii) wiring circuitry of an external F/R selection and on-off switches; in a separate mail to follow.
Che Kuan Yau (Singapore)

 

[waross]

Wo? Watts output?
Single phase.
200 Volts x 3.1 Amps = 620 Watts
250W / 620 Watts = 40% efficiency
Three phase.
200 Volts x 3.1 Amps x root 3 = 23% efficiency.
Both numbers seem low even for a small motor,
Despite that either one may be correct.
Small motors are notorious for low efficiency and poor power factor.

Bill
--------------------
"Why not the best?"
Jimmy Carter

 

[che12345]

Dear All,
Wo? Watts output?
1 Single phase.
200 Volts X 3.1 Amps X Pf(0.8?)* X Eff(0.5?)* = 248 W
1.1 Three phase.
200 Volts X 3.1 Amps X 1.732 X Pf(0.8?)* X Eff(0.5?)* = 429 W
Note * are assumed values
2. a) Name plate shows 250 W,
b) For a small 250W motor, it is unlikely to be wound in three-phase.
3. It is likely to be a single-phase motor.
Che Kuan Yau (Singapore)

 

[che12345]

Dear Mr. Fergal_Hatt
Q. "... I have no idea how to wire up this Crompton PArkinson motor (forward or reverse) ..."
A1. My sincere apology for the long delay due to the following reasons:
a) I emailed the manufacturer on two separate dates, but received no reply,
b) I did a "Google" and "Yahoo" search on Crompton Parkinson's Single-phase motor (wiring diagrams) but none that matches the wiring shown in your picture 1.
A2. Based on your Pic 1, showing 3 terminals (Z) ,(AZ), [A?]; each terminated with two different coloured conductors, while Markings (K), (S), (T) are not in use. I tried to figure it out. It is "likely" a single-phase split-phase motor with centrifugal switch , without starting capacitor. See attachment for wiring. Attention: This is my assumption. It is NOT published by the manufacturer, see above A1. b).
A3. Proposed power source connection:
Power supply source shall be connected to terminal A and AZ. Polarity is immaterial. Earthing wire (coloured yellow-green) shall be connected to the motor frame, without failed.
A4. Based on the assumed wiring, the motor is intended to operate a single [fixed direction of rotation]. The (direction of rotation) does NOT change when the [source conductors are inter-changed].
Che Kuan Yau (Singapore)

 

[waross]

You are to be commended for your extra work to help this poster, Mr. Che.

Bill
--------------------
"Why not the best?"
Jimmy Carter

 

[che12345]

Dear All,
Thank you, Mr.waross.
Mr. Fergal_Hatt , please check my (assumed wiring) against the [actual motor] you have in hand. Your kind feed-back whether it works or failed would be much appreciated. I will revise the circuitry to suit upon receipt of your actual observation on the actual motor. I am at your service at all times, Sir.
Che Kuan Yau (Singapore)

 

[Surefire01]

Totally agree with Waross's last post. Over and above what is required, very refreshing. That goes for all the regular posters here by the way. Super helpful forum.