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How to install 3-phase timer

Electricians forum
Engineering toolbox
3-phase electric meter
Formulas for 3-phase
3-phase timer
EH10 timer and manual: Neutral to terminal 1/ Hot to terminals 2 and 3. Contactor load to terminal 1 and 4
ET series timer 28 set points: Neutral to terminal 1/ Hot to terminal 2 and 3: contactor load to terminals 1 and 4

120Volt box timer

120 Volt 3-pole contactor

Control any 3-phase voltage
Buildings with 3-phase power also have Neutral wire used to power ordinary 120Volt outlets.

1) Use 120 Volt timer.

2) Install 3-pole contactor with 120Volt coil

3) Timer controls 120Volt coil.

4) 3-pole contactor turns 3-phase power ON-andOFF.

Examples of this timer:
Intermatic EH10 7-day programmable
Intermatic T101 24-hour analog
Repeat cycle timers
Dawn-dusk timer
365-day programmable timers
277Volt 24-hr analog timer

Resource
Resources for 3-pole contactors
3-pole contactors at Amazon

3-phase z-wave contactor
How to wire CA375

3-phase z-wave contactor 

CA3750 controls 3-phase with phone or override button

Outline:
Phone or any mobile device communicates with Vera3
Vera3 communicates to CA3750
30A 50-60Hz 2-channel z-wave contactor

Set CA3750 to SPST or DPST
Select 120 Volt

Neutral to terminal A, Hot to terminal B
Jumper wire from terminal B to terminal 1
3-pole contactor coil connects to termina A and terminal 2

Buy:
3-pole contactors at Amazon
Resources for 3-pole contactors

Resource
Resources for 3-pole contactors
How to wire CA3750 + z-wave links


Programmable timers and manuals

120Volt wall timer

120 Volt 3-pole contactor

Use ordinary wall timer to control contactor

Use astronomic ST01C timer for dawn-dusk

Buy:
Resources for 3-pole contactors
3-pole contactors at Amazon

Resource
Resources for 3-pole contactors
Programmable timers and manuals
Contactor blocks
See wall timer wiring

3-phase motor wiring
Larger image

3 phase circuit
Larger image

Example 3 phase switch/timer circuit

Wire colors vary
3-phase breaker located in panel
3-phase 3-wire goes to contactor (or motor starter) and then to motor.
Grounding indicated, but ground wire not shown
No neutral wire shown, and not needed for example motor circuit
2 Hot wires pulled from 3-phase go to double-pole switch or timer.
Switch or timer activates motor starter or contactor, which starts motor.

Fused disconnected added between breaker and starter and motor, and is located at motor.
Required by code to protect anyone servicing motor and to protect wires and motor from overheat..
Fused disconnect added between 3-phase and double-pole switch or timer.
Required by code to protect anyone working on circuit, and to protect wires, switch and contactor
Resource
How to wire 3-phase timer
3-phase motor starter wiring/ pdf
Buy:
Resources for 3-pole contactors
3-pole contactors at Amazon
3-pole disconnect at Amazon
Leviton MS302-DS 600Volt 30 amp double-pole motor switch at Amazon
Resources for 3-pole contactors
3-phase timer
ET series is 20 amp timer/ use 20 amp fuse
View ET series timers and manuals
ET series timer wiring

277 Volt timer

480 V 3-pole contactor

277V 480V 3 Phase service with system Neutral

Applies to any timer with dry contacts

277 volt connects to timer clock terminals
480 Volt connects to dry switching terminals
Buy:
Resources for 3-pole contactors
3-pole contactors at Amazon

SPDT/ timer voltage selected 277V
3-phase timer wiring
Intermatic GM40
Tork DTU40
GE 15207


3-phase timer 277Volt
ET series is 20 amp timer/ use 20 amp fuse
View ET series timers and manuals
ET series timer wiring

277 Volt timer

277 Volt 3-pole contactor

277V 480V 3 Phase service with system Neutral
Buy:
Resources for 3-pole contactors
3-pole contactors at Amazon

SPDT/ timer voltage selected 277V
3-phase timer wiring
Intermatic GM40
Tork DTU40
Intermatic T104 and T174

Square D 277 Volt contactor at Amazon





Intermatic T104
or
T174 w day-skipper

Change to 480Volt timer by changing clock motor from 240V WG1573 to 480V WG1576
Timer for 480 Volt
40 amp timer> max 40 amp fuses
T100 series is 40 amp timer/ use max 40 amp fuse
View T100 series timers and manuals
T100 series timer wiring

480 Volt timer

480 Volt 3-pole contactor

480V 3 Phase no neutral

Use intermatic T104 timer (or identical WH40 timer), and replace WG1573 clock motor with WG1576 480Volt clock motor
Or use Intermatic T174 timer with day-skipper, and follow same instructions

Project links year 2013
Buy:
Buy T104 at Amazon

Resource
How to wire T104 timer
How to set and operate T104 timer

If water heater is 3-phase non-balanced, then other option is to rewire water heater from 3-phase to single phase, and use timer without contactor. So timer has 2 output wires, and they would connect direct to water heater instead of 3-phase wires.
See how to re-wire 3-phase water heater for single-phase

208-240 Volt timer

208-240 Volt 3-pole contactor

Buy:
Resources for 3-pole contactors
3-pole contactors at Amazon
208-240 3-pole contactor

Resource
Intermatic T104 and T174
GM40
DTU 40
Fuseholder

3 phase tiimer
ET series timers and manuals/ 120V Neutral to terminal 1, 120V hot to terminal 2/ contactor wires to terminals 3 and 4
GM seriers timer and manuals/ 120V to terminals L1 and L2/ contactor wires to terminal COM and NO terminals

120 Volt timer

24 Volt 3-pole contactor

1) Timer clock is 120 volt.

2) Timer relays are dry and receive no power from clock wiring.

3) This type of timer can be used to control 24Vac power from a transformer.

4) Install 3-pole contactor with 24Volt coil

5) Timer controls 24Volt coil.

5) 3-pole contactor points turn 3-phase power ON-andOFF.
Buy:
Resources for 3-pole contactors
3-pole contactors at Amazon


Parking lot timer

3-phase Parking lot timer

Dusk-dawn astronomic timer

Buy:
ST01 timer

Resource:

3-phase astronomic timer using ST01 timer


Greenbrook T80 timer wiring

DIN rail timer

3-pole contactor

Illustration shows 230 Volt timer
Fuse-protect this type timer.

Resource:
More DIN rail timers
Fuseholder

How to wire Din rail timer Onesto PST15A timer
Fato ACH15A quartz timer
Digital LCD programmable timer
TP8B16 timer
62DDT0 timer
THC15 timer
Buy:
THC15 timer at Amazon
Onesto PST15A manual
Onesto PST20A manual
Onesto timer wiring

Resource:
Fuseholder
3-pole contactor
Heavy amp loads: 20-90 amps
L terminals for Line wires from breaker
T terminals for load wires

3-pole contactor
3-pole definite purpose Contactor sizes approximately:
20-40 amp 3" tall x 2.4" wide
50-60 amp 3.75" tall x 2.7 wide
75-90 amp 4.5' tall x 3.5 wide
3-pole contactor
Light amp loads: 8-12 amps
A1 A2 coil voltage
L terminals for Line wires from breaker
T terminals for load wires
Terminals 13-14 NO / terminals 21-22 NC
Other terminals apply to auxiliary blocks
Resources:
How to wire motor control contactor
Difference between contactor and relay
How to wire 3-phase
DC relays for solar power

Buy 3-pole contactors/ AC ratings

Buy:
3-pole contactors at Amazon
Noark 3 pole contactor
Packard 3-pole contactor
Mars 2-pole and 3-pole contactors at Amazon
Schneider contactor at Amazon
Kripal 3-pole contactor
Furnas contactor at Amazon
siemens 3-pole contactor
Eaton 3 pole contactor with contact block connectionr
Allen-bradley 3 pole contactor

Buy:
3-pole 120Volt coil

25 amp 3-pole 120V coil
30 amp 120 volt coil
30 amp 3-pole 120V coil
40 amp 120V coil at Amazon
40 amp 120V coil
40 amp /120V coil at Amazon
50 amp 120V coil
60 amp / 3 pole 120 volt coil
60 amp 3-pole 120Volt coil
75 amp 3-pole 120V coil
90 amp 3-pole 120 volt coil

Buy:
3--pole 24 Volt DC coil
Siemens 3RT10 up to 460 volt 5 Hp with auxiliary contacts

Buy:
3 pole 24Volt coil
90 amp 3-pole 24Volt lug connection
75 amp 3-pole 24V coil
75 amp 3-pole 24V coil
60 amp 3-pole 24V coil
50 amp 3-pole 24V coil
40 amp 3-pole 24V coil

Buy:
3 pole 240Volt coil
90 amp 3-pole 240Volt coil Amazon
90 amp 3-pole 208-240Volt coil
75 amp 3-pole 240V coil
70 amp 3-pole 240V coil
50 amp 240V coil
30 amp 3-pole 240V coil

Buy:
3 pole 277volt coil
90 amp 277V coil 3-pole lug terminals
75 amp 277V coil 3-pole lug terminals
60 amp 3-pole 277v coil
50 amp 3-pole 277V coil
40 amp 3-pole 277V coil
30 amp 277V coil 3-pole
20 amp 3-pole 277V coil

Buy:
3-pole 380 volt coil
40 amp

Buy:
3 pole 480Volt coil
40 amp 480V coil at Amazon
40 amp 480V coil at Amazon
50 amp 480V coil
60 amp 480V coil at Amazon
75 amp 480V coil at Amazon
75-90 amp 480V coil at Amazon
90 amp 3-pole 480V coil
100 amp 480V coil at Amazon


Example timers: select 3-phase timer
Help choosing programmable timer
Nema 1 enclosure: Indoor
Nema 3R 3nclosure: Indoor/outdoor
120Volt
EH10 7-day 120Volt programmable timer

Nema1
Programming steps and wiring appear on inside of timer door so they cannot be lost.
6 ON and 6 OFF programs per week.
Terminals 3 and 4 are dry, and can be used for 24Vac transformer and 24V coil contactor: Connect power to terminals 1 and 2. Do not install jumper wire between terminals 2 and 3. Connect wire from transformer to terminal 3. See illustration of dry terminal wiring scroll down to ET1725 timer.

AA battery located below timer buttons.
Resource:
EH10 wiring

120Volt
T101 24-hour analog timer

T101R for indoor-outdoor
Replaceable trippers, Replaceable clock motor. Must be reset after power outage
1 Hour minimum on-off
Resource:
T101 Manual
More wiring diagrams for T101
Wire T104 timer for 277 volts
277Volt
T104 24 hour analog timer

T104R for indoor-outdoor
Can be wired for 277 Volt or 440 volt. Clock wiring must be changed as shown in illustration, same as shown in manual.

Replaceable trippers, Replaceable clock motor. Must be reset after power outage
1 hour minimum on-off because of tripper thickness
Resource:
More wiring diagrams for T104
Compare box timers

Larger image
ET1725 wiring
120 thru 277V
Intermatic ET1715 & ET1725 7-day timer

Can be set for 277 Volts

Default 120Volt.
Can be changed to 240V, 207V on back of timer
14 ON and 14 OFF programs
Two AAA batteries
Resource:
ET series timer
Intermatic ET1715CR timer
Larger image

Dry terminals:
Connect 24Vac transformer wires to 3-pole contactor


ET1725 wiring for 24 volt
GM40 timer wiring
Same wiring for 120/ 277V
Use diagram above to illustrate dry terminal wiring for 24Vac transformer
120-240-277V
Intermatic GM40 timer for 24 hour or 7-day

Can be set for 277 Volts

GM40 24-hour (15 minute time intervals)
GM40W 7-day (2 hour time intervals)
40 amp NO NC contacts
Dip switches to select voltage: Select between 120Volt, 240V, or 277Volt
Set dip switches before applying voltage
Resource:
Compare GM series timers
GM40 timer

120V thru 277V
Intermatic GM40AVE programmable

20 set points
24 or 7-day
1 minute time intervals
120Volt thru 277Volt
Battery back-up
Resource:
Compare GM series timers
Intermatic GM40AVE
FM1 wiring
GMX wiring
Larger image
120Volt
GMX series timer


24 hour (15 minute time intervals)
7-day (2 hour time intervals)
Simple, reliable FM1 timer module installed inside enclosure.
Reset after power outage
Nema 1 indoor
or Nema 3R outdoor enclosures
120V, 240V, 24V
Resource:
GMX sell sheet with model numbers
Intermatic GMX series timer
Larger image

Control 3-phase using 120Volt timer with 4SP & 3SP relays

Same wiring applies to both timers shown
Intermatic T7401B timer
Larger image
120V or 277V

Intermatic T7401B 120Volt 7-day timer

Intermatic T7402 277Volt 7-day timer

Resource:
T7000B Sell sheet

Minimum 2 hour ON-OFF
21 ON-OFF settings per week
T7041B wiring for 3-phase
Tork 7300 timer Tork 7300 24-hour Timer
3SP relays
120Volt clock motor
8-14 gauge wire
40 amp contacts
Single-phase -or- 3-phase 3-wire
Resource:
Tork timers and manuals
3-phase timer
Larger image
Intermatic astronomic timer

Intermatic V45000 astronomic 24-hour dawn-to-dusk timer
3SP relays
120Volt clock motor
8-14 gauge wire
40 amp contacts
Single-phase -or- 3-phase 3-wire
Resource:
Instruction manual 120V
Intermatic timers and manuals

How to wire 3-phase outlets and surge protection

Cooper brand outlets
Resource:
Wire color codes at Wikipedia
Cooper phase wiring diagrams
Line-to-line voltage = line to neutral x √3
3-phase has 2 varieties: 3-wire: three hot wires and no neutral, and 4-wire: three hot wires and a neutral

Resource:
Types of phase wiring


3-phase wiring
Larger image
277 480 Three Phase WYE

480 volts across line-to-line

277 volts line-to-neutral

All Wye connections provide two voltages due to the common point or neutral connection.

Line-to-line voltage = 480V
Line-to-neutral voltage = 277V
277 Volt x √3 = 479.778 Volt

√3 = 1.7320
Voltages are higher or lower based on windings inside the transformer.
Power is generated at plant by rotating 3 coils in a magnetic field => power is sent out on 3 lines => power travels over wires to local area => power lines are connected to transformer => power is changed into specific voltage depending on which transformer is installed, and how the transformer is wired.
WYE or Delta configuration refers to how the 3-phase transformer coils are wired.
Inside each transformer are two coils: Primary coil is connected to power generation side. Secondary coil is connected to service wires that feed the service panel and circuit breakers.
If secondary coil is wound in WYE, then power to the service panel will always have a neutral, and two voltages.



3-phase wiring
Larger image
277 480 Three Phase WYE

480 volts across line-to-line

277 volts line-to-neutral

Shows equipment ground
277 480 3-phase WYE
Use AG4803CE surge protector




Larger image
Three Phase 480V

480 volts across line-to-line

No system ground

Shows equipment ground
480 3 phase delta
Use AG4803D3 surge protector
Three Phase 480V delta corner ground

480 volts across line-to-line



3-phase wiring
Larger image
120 208V 3-phase wye

208 volts across line-to-line

120 volts line-to-neutral




3-phase wiring
Larger image
120 208V 3-phase wye
3 phase 4 wire
 
208 volts across line-to-line

120 volts line-to-neutral

Shows equipment ground
120 208 3-phase wye
Use AG2083C3 surge protector
120 208V 3-phase wye
Intermatic AG208C3 Surge




208 Volt 3-wire delta
3 Phase 3 wire 208 No Neutral

Phase to phase 208V



3-phase wiring
Larger image
347 600V three phase wye

600 volts across line-to-line

347 volts line-to-neutral




3-phase wiring
Larger image
347 600V three phase wye

600 volts across line-to-line

347 volts line-to-neutral

Shows equipment ground
347 600 3 phase wye
Use AG65033 surge protector
347 600V three phase wye
Intermatic AG65033 Surge Protection




How to wire 600 volt outlet
Larger image
Three Phase 600V

600 volts across line-to-line

No system ground

Shows equipment ground



How to wire 240 volt outlet and plug
Larger image
Three phase 250V

250V across each line

No ground
240 Delta 3-phase
Use AG2403D3 surge protector
Hagar EH 010 wiring
Larger image

Hagar EH 010 timer connected to 3 phase 250V


Must have line fuse or fuse carrier installed to protect timer and wires to timer.
Install 3-pole contactor with 240-250V coil
High leg DeltaHigh leg delta   120-240 High leg Delta
Intermatic AG2403C3 surge protection

Black Line to Black Line 240V

Black Line to Neutral 120V

Red Line to Neutral 208V
120 240 high leg delta
Use AG2403C3 surge protector
240-480 High leg Delta

Phase to phase 480V

Phase A Phase C to Neutral 240V

Phase B high leg to Neutral 415V

Voltages are doubled compared with 120-240 high leg

High leg delta Image shows Delta primary coil and High-leg delta secondary coil inside transformer
Resource:
Read about transformers
Primary coil (or winding) is connected to power generation side.
Secondary coil is connected to service wires that feed the service panel and circuit breakers.

Configuration shows Delta primary coil. And High leg delta secondary coil.

If coil inside transformer is wound in Delta configuration, there is no point where equal potential can be made between line and neutral.
The midpoint winding S3 is tapped which gives 120V or 208 volt to line.
S1 coil on one side of delta and S2 coil on other side of delta cannot carry 120Volt loads.
Center tap on S3 coil is used for all 120Volt loads, plus S3 coil is used for 1/3 all 3-phase loads, causing potential imbalance.
120Volt loads must not exceed 5% of total Kva to preserve balance across 3 phase lines
The wild leg, or Leg B, or Phase B, is illustrated as Secondary B, and is marked with orange dot since the orange wire connects to this leg

High leg wire color is orange. High leg delta wire color
Resource:
Read


How to wire 480 volt outlet and plug
Larger image
277 480 Volts Single phase

With equipment ground
277 480 single phase
Use AG48013 Surge protector
277 480 Volts Single phase
Intermatic AG48013 Surge


Household wiring
120volt single-phase and 240 Volt split-phase

Intermatic IG1240RC3
Whole house surge
Larger image
Intermatic IG1240RC3 whole house surge protector/ pdf
Protect your business/ Protect circuit breaker panel and 120V and 240V circuits/ protect your tankless water heater, and any water heater with electronics
Installed directly into circuit breaker panel/ Replaced after each event
Protects circuit breakers, main panel, electric wiring, electronics, appliances
Does not protect TVs connected to sattellite dish/ for TVs use surge protector with co-ax TV connector
120 240 single phase 120 volt single phase
Gas and electric water heaters Support the economy:
Buy water heaters  from my associate links:

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Hybrid / heat pump/ water heaters at Amazon

Resources:
How to install gas water heater
How to install electric water heater
Troubleshoot gas water heater
Troubleshoot electric water heater
Point of use water heaters
Gas and electric water heaters Buy
Industrial electric at Amazon


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