Veris H704-42 Installation Instructions

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POWER MONITORING

NOTICE

DANGER

INSTALLATION GUIDE

H704-42(H)(E), H704-42/1(H)(E)

Branch Current Monitor

Installer's Speciﬁcations

General:

Operating Temp. Range 0° to 60°C (32° to 140°F) (<95% RH, non-condensing) Storage Temp. Range -40° to 70°C (-4 0° to 158°F) Control (Mains) Power Source 120 VAC L-N, 50/60 Hz (208/230 VAC for H704-42/1(E)) (+10/-25%) Input current < 75 mA Primary Fusing 250 VAC/100 mA, (T) 5 x 20 mm, (if equipped) Littelfuse 218 series or equivalent Altitude of Operation 3 km max.

Measured Current Inputs:

Number of Channels 42 Frequency 50/60 Hz Sample Frequency 1280 Hz Update Rate 1.2 sec Accuracy ±2% from 5 A to 50 A * Overload Capability Tested to 10,000 A single-cycle Connection to Conductor Solid-core toroid Measured Currents Current range 0-50 A (max. conductor si ze is AWG#6 THHN) Measured Currents, H version Current range 0-100 A (max. conduc tor size is AWG#2 THHN)

Network Communications:

Typ e Modbus RTU Connection DIP switch-selectable 2-wire or 4-wire Address DIP switch-selectable address 1 to 247 Baud Rate DIP switch-selectable 2400, 4800, 9600, 19200 Parity DIP switch-selectable NONE, ODD, EVEN Communication Format 8-data-bits, 1-start-bi t, 1-stop-bit Termination 5-position depluggable connector (TX+ TX- SHIELD TX+/RX+ TX-/RX-)

Defaults:

Warning Register 60% of current sensor max. (conﬁgurable) Alarm Register 70% of current sensor max. (conﬁgurable) Breaker Size Register 20 A

MODEL # CT SPACING

H704-42(H)(E) ¾" on center

H704-42/1(H)(E) 1" on center

For a 400A Panel, order the H704-42Y55

* In case of a current fault above 60A (120 for the H version), all adjacent channels will re port higher than actua l readings. To prevent this from causing over-current warnings and alarms, configure the warning an d alarm delays for a longer time period than the resp onse time of the br eak er.

quick install

1. Disconnect and lock out power.

2. Mount current sensor strips adjacent to breaker terminations.

3. Verify that serial numbers on CT and board match.

4. Mount board onto electrical/ﬁre enclosure.

5. Connect CTs and wire the board.

6. Reconnect power.

7. Conﬁgure communication and addressing parameters.

Note: Data acquisition board and CT strips are calibrated as a set. Match the serial

numbered parts together.

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H704

6 4 2

10 8 18

INSTALLATION GUIDE

operation

The H704-42 Branch Current Monitor is a current sensing device designed to monitor all 42 poles of a panel board. Designed for critical load monitoring such as Co-location Data Centers and lighting panels, the H704-42 provides important branch circuit amperage and capacit y information. By reporting current levels and initiating capacity warnings and alarms, the H704-42 allows the management of power and eliminates open circuits caused by overloaded breakers.

The H704-42 consists of a Data Acquisition Board and two 21-unit current sensor strips. The strips are mounted on each side of the panel board along the termination points of each breaker. The conductor passes through the appropriate current sensor before terminating at the breaker. Each strip transmits the current data to the Data Acquisition Board through snap on ribbon cable. An optional hardware kit is available for mounting the H704-42.

Data is transmitted using an RS485 Modbus protocol. Each Data Acquisition Board is addressed on the modbus daisy chain network.

Setup is made easy with a PC based conﬁguration tool which allows for global or individual selection of breaker size, warning levels, and alarm levels.

*For 208/230VAC Power Connection versio n, order H704-42(H)(E)/H704-42/1(H)(E)

dimensions

Circuit Board and Mounti ng Bracket

product diagram

1. RS 485 2 or 4-Wire Connection: Daisy chain multiple H704-42's using a 2-wire or 4-wire modbus network.

2. Optical Communications Isolation: Optical isolators are used to separate 120 VAC portions of the circuit from the RS485 network.

3. Alive LED: Flashes once per second to indicate correct operation. If steadily lit or out, indicates internal failure.

4. 50-Pin Ribbon Cable Connec tors (Data Acquisition Board): 18-inch (457 mm) ribbon cables are provided standard** for easy snap connection of current sensor strips to this point of the Data Acquisition Board.

5. Control (Mains) Power Connection*: Easy 2-wire 120 VAC line to neutral 50/60 Hz.

6. 250VAC 100mA Time Delay Fuse: Fused power connection for circuit protec tion.

7. Power Transformers: Linear power supply for reliability and low noise

8. Baud Rate & Parity Selection Switches: Field selectable RS-485 serial interface control.

9. Modbus Address Dip Switches: Each Modbus device must have a unique address. These switches must be set to assign an individual address before the device is connected to the network.

10. TX LED: Indicates successful transmission of information over the Modbus network.

11. RX LED: Indicates data received on the Modbus network

12. Current Sensors: Each current sensor is capable of monitoring conductors carrying up to a maximum of 50 amps. Maximum wire size capacity is #6 AWG THHN. H version can monitor up to 100 amps with a maximum wire size capacity of #2 AWG THHN

13. 50 Pin Ribbon Cable Connectors (CT Strips): 18" ribbon cables are provided standard** for easy snap connection of Data Acquisition Board strips to this point of the current sensor strips

*For 208/230VAC Power Connection versio n, order catalog number H704-42/H704-42/1E.

**Additional sizes are available for sa le.

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H704

11.375"

(289 mm)

1.12"

(28 mm)

5.75"

(146 mm)

Data Acquisition Board

Mounting Bracket

Data Acquisition Board

19.5

495

1.0

0.75

Side View

1.3

0.4 opening

10.16

0.75 on center

1.2

20.31

515

“Right” strip shown

19.5"

(241 mm)

0.75 " o n ce nter (19 mm)

0.35" open ing (9 mm )

1.0" (26 mm)

24.0"

1.0"

INSTALLATION GUIDE

safety

UL listed under standard 508 as an "open type device." Installation categor y: CAT II or CAT III Critical components evaluated to UL 1950.

The H704 Series must be installed in as appropriate electrical and ﬁre enclosure per local regulations. For use in a Pollution Degree 2 or better environment only.

A Pollution Degree 2 environment must control conductive pollution and the possibility of condensation or high humidity. Consideration must be given to the enclosure, the correct use of ventilation, thermal properties of the equipment and the relationship with the environment.

This symbol indicates an electrical shock hazard exists.

Documentation must be consulted where this symbol is used

on the product.

installation

1. Inspect the Mounting Bracket Kit. The acquisition and interconnection boards are mounted to the bracket at the factory.

50A Solid-Core CT Strips

H704 -42

H704 -42/1

100A Solid-Core CT Strip

H704 -42(H)

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