Time Mark

Time Mark 21 3-Phase Monitor with Adjustable Trip and Restart Delays

Name: Time Mark 21 3-Phase Monitor with Adjustable Trip and Restart Delays
Brand: Time Mark
SKU: 21-H
Price: 147.76 USD
Availability: InStock

In stock

SKU: 21-H

$147.76 inc. VAT

Product variants

3 Phase Monitor

Microcontroller-based
Adjustable trip and restart delays
LED status
Automatic or manual restart versions

The Model 21 is a microcontroller-based universal 3-phase monitor for protecting 3-phase motors from abnormal power conditions. It can detect under voltage, over voltage, voltage unbalance, reverse phase, and single-phasing even when regenerated voltage is present. The Model 21 includes adjustable trip and restart delays to prevent nuisance tripping during power fluctuations and short cycling in compressor applications.

The LED status indicators and adjustment pots for Voltage Adjustment, % Unbalance, Restart Delay and Trip Delay are mounted on the front of the unit for easy access. Automatic or manual restart versions are available. The Model 21 does not require a neutral connection and can be used on either Wye or Delta systems.

Typical Application	Dimensions

Manuals/Guides

Manufacturer Specs

General Specification
Auto Reset Models Manual Reset Models*	21 21M	21-L 21-LM	21-H 21-HM
Operating Voltage	190-480 VAC	95-120 VAC	475-600 VAC
Power Consumption	3.7W at 480V	3.7W at 120V	4.5W at 600V
Auto Ranges	Yes	No
Frequency	50/60Hz
Type of Measurement	RMS
Under Voltage Trip Reset	(% of setpoint) 90% ±1% 93% ±1%
Over Voltage Trip Reset	(% of setpoint) 110% ±1% 107% ±1%
Voltage Unbalance Trip Reset	(conforms to NEMA) 2-8%, adjustable Trip setting minus 0.7%
Trip Delay Time Over, Under, & Unbalanced Single-Phasing Faults Unbalance > 15%	1-30 sec., adjustable 1 sec., fixed 1 sec., fixed
Restart Delay	1-500 sec., adjustable
Manual Reset Input	5V open circuit/500µA short circuit
Output Contacts	SPDT 10 amps at 240VAC resistive
Operating Temp	- 20º to +140º F
Humidity Tolerance	0-97% w/o condensation
Enclosure	Noryl plastic
Mounting	8-Pin Socket (**sold separately)
Weight	9.5 oz.
Option for Low Current Applications	Models ordered with suffix "/SG" have silver with gold flash contacts
Agency Approval	UL Recognized (U.S. and Canada) (For use in a Pollution Degree 2 Environment)

Tech Specs

Three Phase Monitor Relays
3-Phase Monitor Relay Function	Phase Loss/Reversal/Unbalance/Under & Over Voltage
Max Nominal Phase to Phase Voltage (monitors)	480 VAC
Min Nominal Phase to Phase Voltage (monitors)	190 VAC
TIME MARK DELAY	Adjustable Trip Delay
Electrical Approval (monitor relays)	CSA, UL
Time Mark Mounting	8-pin
Test Equipment General Attributes
Warranty	5 YEARS
Warranty Details	This product is warranted to be free from defects in materials and workmanship, and is covered by our exclusive 5-year Unconditional Warranty. Should this device fail to operate for any reason, we will repair it for five years from the date of manufacture.
Safety Approval	CSA, UL
Product Weight	0.7 LBS
Product Height	3.53 IN
Product Length	2.45 IN
Product Width	1.77 IN
Country of Origin	United States
Shipping Height	3.53 IN
UPC	662917001350
Shipping Length	2.45 IN
Shipping Width	1.77 IN

Time Mark 21 3-Phase Monitor with Adjustable Trip and Restart Delays

3 Phase Monitor

Manuals/Guides

Manufacturer Specs

Tech Specs

Three Phase Monitor Relays

Test Equipment General Attributes