Novatek OM-310 User guide

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NOVATEK-ELECTRO LTD Research-and-Manufacture Company

POWER LIMITER

OM-310

USERS MANUAL

www.novatek-electro.com

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CONTENT

1. DESCRIPTION AND OPERATION .................................................................................................................................... 3

1.1 APPLICATIO N .............................................................................................................................................................. 3

1.1.1 OM-310 power limiter is designed for the following applications: ......................................................................... 3

1.1.2 OM-310 application limitations and proper selection of parameters ..................................................................... 3

1.1.3 Integrated relays output terminals specification .................................................................................................... 4

1.1.4 List of abbreviations used ..................................................................................................................................... 4

1.2 TECHNICAL BRI EF ...................................................................................................................................................... 4

1.2.1 Basic technical parameters .................................................................................................................................. 4

1.2.2 Measured and calculated parameters .................................................................................................................. 4

1.2.3 Programmable parameters and their variability ranges ....................................................................................... 6

1.2.4 Operating controls and the dimensions of the ОМ-310 ....................................................................................... 9

1.2.5 Power Limiting Functions .................................................................................................................................... 10

1.2.6 Protection functions ............................................................................................................................................ 12

1.3 PRODUCT PACKAGE CONTENTS ........................................................................................................................... 13

1.4 EQUIPMENT FEATURES AND OPERATION ........................................................................................................... 13

2. INTENDED USE ............................................................................................................................................................... 13

2.1. SAFETY ..................................................................................................................................................................... 13

2.2 ОМ-310 DEVICE CONTROL ...................................................................................................................................... 13

2.2.1 Control Modes ..................................................................................................................................................... 13

2.2.2 Disabled keypad mode ........................................................................................................................................ 14

2.2.3 MMSP mode ...................................................................................................................................................... 14

2.2.4 User level ........................................................................................................................................................... 14

2.2.5 Service Engineer Level ....................................................................................................................................... 14

2.2.6 Restoring factory settings. .................................................................................................................................. 15

2.3 OM-310 PRE-OPERATION PROCEDURE ................................................................................................................ 15

2.4 INTENDED USE ......................................................................................................................................................... 16

2.4.1 ОМ-310 operation before load relay closure ...................................................................................................... 16

2.4.2 OM-310 operation before load relay closure ....................................................................................................... 17

2.4.3 Characterizing relay operation ............................................................................................................................ 17

2.4.4 Work with RS-232/RS-485 interface under MODBUS protocol in RTU mode. ................................................... 17

2.4.5 The load energize/de-energize remote control via RS-232/RS-485 interface. .................................................. 21

2.4.6 Load energize/de-energize via remote breaker .................................................................................................. 22

2.4.7 Fault conditions system ....................................................................................................................................... 22

2.4.8 Faulty conditions log .......................................................................................................................................... 22

2.4.9 Load start/cutoff control with use of OM-310 front panel .................................................................................... 23

3. MAINTENANCE ............................................................................................................................................................... 24

3.1. SAFETY ..................................................................................................................................................................... 24

3.2 MAINTENANCE SCHEDULE ..................................................................................................................................... 24

4. TRANSPORTATION AND STORAGE ............................................................................................................................. 24

5. PERIOD OF SERVICE, STORAGE, AND MANUFACTURER’S WARRANTY .............................................................. 24

6. ACCEPTANCE CERTIFICATE ...................................................................... ОШИБКА! ЗАКЛАДКА НЕ ОПРЕДЕЛЕНА.

APPENDIX 1- DEPENDENT TIME DELAY CURRENT BASED PROTECTION TYPES: ................................................. 25

ОМ-310

NOVATEK-ELECTRO

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1. DESCRIP TION AND OPERATION

1.1 APPLICATION

1.1.1 OM-310 power limiter is designed for the following applications:

- load protection at poor p ar ameters of the mains;

- complete load cutoff in c ase i f w at t s input exceeds the main threshold wit hi n t he use r-set time period;

- partial load cutoff in case if wat t s inp ut exce eds the additional threshold wit hi n t he user-set time period;

- measurement and indication of 3-phase electric circuit (delta voltage and mesh voltage RMS values; positive phase, negative phase and zero phase sequence voltages; phase currents RMS values; input wattage of active power, wattles power, appar ent power, power factor (cos ϕ))

- fault warning;

- remote load on and off via RS-232/RS485 interface or and ext er nal switch.

OM-310 provides for operation under loads ranging from 2,5 kW to 30 kW with use of integrated current transfor-

mers, and up to 350 kW at use of external current transformers, including when in networks with insulated neutral.

OM-310 device provides the following types of load pr ot ection:

- when the mains voltage is of poor quality (impermissible voltage surges, phase loss, incorrect phase sequence and phase "coincidence", phase/line voltage i mba la nce );

- when maximum specified cu rr ent in any load phase is exceeded;

- against “ground” leakage currents;

For each separate type of pr ot ection, the unit allows to enable or disable automatic load reset (further : AR) OM-310 provides electric equ ipment protection by means of a ma gnet ic starter (contactor) coil control.

OM-310 the user has possibility to choose functionality of additional relay and use it for following operations:

Using

-signalization emergency situations

- contactor connection of additional loading

-as time relay

-signalization of reactive power excess

-signalization of active power excess

Communication

ОМ-310 provides for:

- control and parameters t r ansfer via RS-485 interface accor di ng t o M O DBUS protocol,

- control and parameters transfer via RS-232 interface.

N o t e: Simultaneous use of RS-48 5 and RS-232 is not possible. Interaction of PC and OM-310 is possible via "OM-310 Co nt r ol Panel” Software that can be downlo aded from

the “Novatek-Electro” website (http://www.novatek-electro.com/production_ом.htm).

OM-310 Control Panel software is dedicated for monitoring status and retrieving data from OM-310 devices via standard communication inter f ace (RS-232 or RS-485). The Software allows for saving (loading) various retrieving data and saving them for further research. The user can view sa ved data in a graph, while compar ing parameters.

The CP graphic environ m ent all ow s f or r eal-t ime viewing the current status of various OM-310 parameters.

The flexible interface design allows t uning it to any user’s preferences.

1.1.2 OM-310 applicati on limitations and proper sel ect ion of parameters

1.1.2.1 Use of integrate d cur r ent t r ansformers.

Attention! OM-310 cannot be used for protect i on of load with wattage over 30 kW.

When measuring load currents from 63A to 300A, the measurement error does not exceed 5% , w hile at currents over 320A, the current transformer core saturation starts, and the measurement error increases rapidly. Regardless In spite of the actual current value, the current measured by OM-310 will not exceed 400A. Setting up certain programmable parameters (maximum current protection) without regard to current transformers saturation will make protection tripping impossible.

For example, at “

”=50 (load rated current),  =0 (ratio of independent delay current protection),  =9 (maximum current protection tripping), the maximum current protection would have tripped at current value of 450А. Due to current transformer saturation, the measured current value will not exceed 380-400A, even in case of a short circuit from the load side, and currents of over 1000A, and, therefore, ОМ-310 will no t de-energize the load. In such

case (“

”=50) the user shall set the overcur r ent t r ipping ratio to not more than 6.

1.1.2.2 Use of external currents transformers.

In case of tested standard transformer samples, the core saturation took place at 4-5 times the rated current value. Therefore, to provide for proper functioning of ОМ-310 protections, one should select external transformers with rated current value exceeding the rated load currents twice and more, or choose parameters considering the saturation.

OM-310 settings,