abb relay manual

ANY Timer Rrelay
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Efficient abb relay manual for High-Risk Applications
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Migro PLC Programming Software, Simulator and Monitoring, Example and Manuals in CD. Virtual Training. ■ No hardware required

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  • $20.00 Coupon included for future PLC hardware
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PLC Programming Software, Programming and Simulation, Time clocks, Timer, Logic and more , For training No hardware required. PLC Program and Simulator features include: Featured: inputs, outputs and functions. •Input Switches operable from the computer keyboard or by clicking on them. •Instantaneous Relay contacts (normally-open and normally-closed). •Instantaneous Timer contacts (normally-open and normally-closed). •Timed Timer and counter contacts • Branch wiring •Real Time 365 Day Clock Day, Month, Years • Weekly timer: Hour, Days •Latch and Unlatch Relays •Master Control Relays (MCR) •On-Delay Timers (TON) •Off-Delay Timers (TOF) •Retentive Timers (RTO) •Counters •Timer/Counter Reset (RES) • Shift Register • Set Reset •Logical Outputs (AND, OR, NOT, and XOR) •And More 1. Easy and convenient program creation and editing. 2. Programs can be saved on a computer and accessed at any time. 3. Programs can also be upload from the EDPLC controller and then edited. 4. Enables users to print programs for reference and review. 5. The Simulation Mode allows users to virtually run and test the program before it is loaded to the the EDPLC 6. Real-time communication allows the user to monitor the EDPLC operation during RUN mode

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zaid asked How Can we test the diff relay characteristic?

I Know there are equations for each diff relay ! but i have a problem how can i test the diff characteristic depending on those equations ?

And got the following answer:

It's always great to see answers from people who have no idea about the art and science of protective relaying... While the specific equations of your current differential relay will be given in the manufacturer's manual, you can still determine its major characteristics without the manual. Current differential relays use the concept of measuring the current flowing into and out of a device, and determining how much of that current is 'lost'. If this difference in current is excessive, the relay trips the breaker to de-energize the circuit(s). Usually, the discrimination is a percentage of the current flowing into the protected equipment, e.g. a 15% setting would trip for a difference or current 'loss' above that level. Since there may be measurement uncertainty, especially at low current levels, it is common for the trip characteristic to require a definite non-zero amount of difference current before tripping. (You wouldn't want a transformer differential to trip on magnetizing branch current.) Likewise, for tremendous levels of difference current, the relay may use an altered characteristic to provide faster tripping, or more security, depending on the application. The manufacturers usually provide very detailed descriptions of their relays. Look for ABB, Siemens, Schweitzer Engineering Labs (selinc.com), GE-Multilin. I would start by hooking up two 3-phase sets of current sources (the test set) to the relay and shoot a little current in it. Gradually increase the differential current until it trips. Do the same for higher "through" currents, and on the other phases. With enough testing, you will determine the characteristic. The manual will help you get the testing set up correctly. If you don't have a dual 3-phase test set, it may be possible to test the relay with a single-phase set, but only for a small number of the possible current differential relay configurations. Voltage differential relays work on basically the same principle, but they are limited in application. High impedance bus differential relays are a very different form of current differential relay. They rely on the saturation characteristics of matched sets of CTs to detect if a fault is within the bus protected zone (trip) or outside the zone (no-trip). These Hi-Z bus diff relays are basically over-voltage relays with a few extra features. Check with the engineer before twiddling...


The abb relay manual perform exceptionally effectively with distinctive applications that are precise to energy distribution and protection. The relays include wide adjustment ranges with a scale that is definitely easy to read either in 3 or four digits in line with the model. These abb relay manual help in increasing the flexibility of your applications, lower the general energy and upkeep charges. You’ll find relays that are made use of for common purposes which come in dependable styles with quick replacement choices. And you can find models that are utilised for industrial applications and heavier duty applications that operate on significant loads. These items are made to meet the lifetime industrial manage demands of the applications.
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