Installation Guide
Current Sensors
Z201200-0G
Page 1 of 4
06132
Alta Labs, Enercept, Enspector, Hawkeye, Trustat, Aerospond, Veris, and the Veris ‘V’ logo are trademarks or registered trademarks of Veris Industries, L.L.C. in the USA and/or other countries.
Other companies’ trademarks are hereby acknowledged to belong to their respective owners.
TM
HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH
• Follow safe electrical work practices. See NFPA 70E in the USA, or applicable local codes.
• This equipment must only be installed and serviced by qualified electrical personnel.
• Read, understand and follow the instructions before installing this product.
• Turn off all power supplying equipment before working on or inside the equipment.
• Use a properly rated voltage sensing device to confirm power is off.
DO NOT DEPEND ON THIS PRODUCT FOR VOLTAGE INDICATION
• Only install this product on insulated conductors.
Failure to follow these instructions will result in death or serious injury.
A qualified person is one who has skills and knowledge related to the construction and
operation of this electrical equipment and the installation, and has received safety
training to recognize and avoid the hazards involved.
NEC2011 Article 100
No responsibility is assumed by Veris Industries for any consequences arising out of the
use of this material.
DANGER
NOTICE
• This product is not intended for life or safety applications.
• Do not install this product in hazardous or classified locations.
• The installer is responsible for conformance to all applicable codes.
• Mount this product inside a suitable fire and electrical enclosure.
Product Identification
Part Number
Description
H421
High current monitoring, 4-20 mA analog output, scalable amperage range (1000 to 2400 A upper limit)
H421SP
High current monitoring, 4-20 mA analog output, amperage range set at factory (1000, 1200, 1400,
1600, 1800, 2000, 2200, or 2400 A upper limit, specified by customer at ordering)
Product Overview
The H421 and the H421SP are current transducers that sense current (amperage) in the monitored conductor. The
H421 amperage range is field-adjustable, with ranges of 0-1000A thru 0-2400A possible. The H421SP is factory-
set at a range with an upper limit specified by the customer upon ordering (1000A, 1200A, 1400A, 1600A, 1800A,
2000A, 2200A, 2400A, and 2400A options available for upper limits). Both devices transform the monitored current
into 4-20mA DC output, suitable for connection to building controllers or other appropriate data acquisition
equipment. The H421 and H421SP require a 12-30 VDC external power supply to generate their output.
H421/H421SP
Split-Core Current Transducer,
High Current, 4-20mA Output
Specifications
Sensor Power
30mA (max.) @12-30VDC
Amperage Range
H421: 0-1000A thru 0-2400A (scalable)
H421SP: Factory-set at a customer-specified upper limit (1000, 1200,
1400, 1600, 1800, 2000, 2200, and 2400 A available)
Sensor Output
4-20mA
Response Time
2 sec.
Insulation Class
600VAC RMS, insulated conductors only
Frequency
50/60 Hz
Temperature Range
-15° to 60°C (5° to 140°F)
Humidity Range
10-90% RH non-condensing
Accuracy
±2% F.S. from 10% to 100% of selected current range
Zero Adjustment
nominal output@0A: 4mA ± 0.5
Terminal Block Wire Size
12 to 22 AWG (3.3 to 0.3 mm
2
)
Terminal Block Torque
3.5 to 4.4 in-lb (0.4 to 0.5 N-m)
Installation Category
Cat. III, pollution degree 2
This product provides basic insulation only.
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