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Protection relays
Numerical relays are based on the use of microprocessors. The first numerical relays were released in 1985.A big difference between conventional electromechanical and static relays is how the relays are wired. Electromechanical and static relays have fixed wiring and the setting is manual. Numeric relays, on the other hand, are programmable relays where the characteristics and behavior can be programmed. Most numerical relays are also multifunctional.
Feeder protection and control REF615 IEC
REF615 is a specialized feeder protection and control relay designed for the protection, control, measurement, and supervision of public substations and industrial power systems, including radial, circular, and mesh distribution networks with or without distributed generation. REF615 is a member of the Relion product line and a part of its 615 protection and control product line. The characteristics of the 615 series relays are their compactness and withdrawable unit design.The 615 series has been redesigned from scratch with the aim of unleashing the full potential of the IEC 61850 standard in communication and interoperability between substation automation equipment.
Relay provides primary protection for overhead lines and cable feeders in the distribution network. In applications that require independent and redundant protection systems, relays are also used as backup protection.
According to the selected standard configuration, relays are suitable for the protection of overhead lines and cable feeders in isolated neutral points, resistance grounding, compensation, and stable grounding networks. Once the standard configuration relay is assigned application specific settings, it can be directly put into use.
Technical data | |||
Dimensions | |||
| Description | Value | ||
| Width | Frame | 177 mm | |
| Case | 164 mm | ||
| Height | Frame | 177 mm (4U) | |
| Case | 160 mm | ||
| Depth | 201 mm (153 + 48 mm) | ||
| Weight | Complete protection relay | 4.1 kg | |
| Plug-in unit only | 2.1 kg | ||
Power supply | |||
| Description | Type 1 | Type 2 | |
| Nominal auxiliary voltage U n | 100, 110, 120, 220, 240 V AC, 50 and 60 Hz | 24, 30, 48, 60 V DC | |
| 48, 60, 110, 125, 220, 250 V DC | |||
| Maximum interruption time in the auxiliary DC voltage without resetting the relay | 50 ms at U n | ||
| Auxiliary voltage variation | 38...110% of U n (38...264 V AC) | 50...120% of U n (12...72 V DC) | |
| 80...120% of U n (38.4...300 V DC) | |||
| Start-up threshold | 19.2 V DC (24 V DC × 80%) | ||
| Burden of auxiliary voltage supply under quiescent (P q)/operating condition | DC <13.0 W (nominal)/<18.0 W (max.) | DC <13.0 W (nominal)/<18.0 W (max.) | |
| AC <16.0 W (nominal)/<21.0 W (max.) | |||
| Ripple in the DC auxiliary voltage | Max 15% of the DC value (at frequency of 100 Hz) | ||
| Fuse type | T4A/250 V | ||
| Energizing inputs | |||
| Description | Value | ||
| Rated frequency | 50/60 Hz | ||
| Current inputs | Rated current, In | 0.2/1 A 1 | 1/5 A 2 |
| Thermal withstand capability | |||
| 4 A 1 | 20 A | |
| 100 A 1 | 500 A | |
| Dynamic current withstand | |||
| 250 A | 1250 A | |
| Input impedance | <100 mΩ | <20 mΩ | |
| Voltage inputs | Rated voltage | 60...210 V AC | |
| Voltage withstand | |||
| 240 V AC | ||
| 360 V AC | ||
| Burden at rated voltage | <0.05 VA | ||
| 1 | Display | Default view can be selected from single line diagram (SLD), measurements and main menu |
| 2 | Self-supervision and protection indicator LEDs | Ready-LED steady: OK, Ready-LED flashing: Internal Relay Fault (IRF), Start-LED steady: protection started, Start-LED flashing: protection function blocked, Trip-LED: protection operated |
| 3 | Programmable LEDs | Can be programmed for alarming and indication with latching and/or flashing features |
| 4 | Control Circuit Breaker (CB) | Press open/close and confirm by pressing enter. If there is more than one controllable object select the object first with navigation buttons. Note: control has to be in Local mode. |
| 5 | Escape / Cancel | Used for canceling actions and leaving setting mode without saving the values. Returns back to menu. |
| 6 | Navigation | Left = go back, Right = go further, Up = scroll up, Down = scroll down. Up/down can also be used when selecting controllable objects like breakers and switches in single line diagram. |
| 7 | Enter / Select | Entering to parameter setting mode and confirming new values |
| 8 | Authorization | If authorization is used you can log in or log out using this button |
| 9 | Clear | Clearing events and indications, see next page for further details |
| 10 | Menu | Switch views in between the main menu, single line diagram and measurements |
| 11 | Local / Remote | Changes the control between Local/Remote |
| 12 | Help | View help messages |
| Standard configurations | |
| Description | Std. conf. |
| Non-directional overcurrent and directional earth-fault protection | A |
| Non-directional overcurrent and directional earth-fault protection and circuit-breaker condition monitoring (RTD option) | B |
| Non-directional overcurrent and earth-fault protection | C |
| Non-directional overcurrent and earth-fault protection and circuit-breaker condition monitoring (RTD option) | D |
| Non-directional overcurrent and directional earth-fault protection, voltage-based measurements and circuitbreaker condition monitoring (RTD option) | E |
| Directional overcurrent and earth-fault protection, voltage-based protection and measurements, and circuitbreaker condition monitoring (RTD option) | F |
| Directional overcurrent and earth-fault protection, voltage-based protection and measurements, and circuitbreaker condition monitoring (sensor inputs and optional synchro-check with IEC 61850-9-2 LE) | G |
| Non-directional overcurrent and earth-fault protection, voltage and frequency based protection and measurements, synchro-check and circuit-breaker condition monitoring (RTD option) | H |
| Directional overcurrent and earth-fault protection, voltage and frequency based protection and measurements, synchro-check and circuit-breaker condition monitoring (optional power quality and RTD option) | J |
| Directional and non-directional overcurrent and earth-fault protection, high-impedance restricted earth-fault protection, voltage and frequency based protection and measurements, synchro-check and circuit-breaker condition monitoring (optional power quality and fault locator) | K |
| Directional and non-directional overcurrent and earth-fault protection with multifrequency neutral admittance, voltage, frequency and power based protection and measurements, and circuit-breaker condition monitoring (sensor inputs, optional power quality, fault locator, interconnetion protection and synchro-check with IEC 61850-9-2 LE) | L |
| Directional and non-directional overcurrent and earth-fault protection with multifrequency neutral admittance, voltage, frequency and power based protection and measurements, high-impedance differential protection, synchro-check and circuit-breaker condition monitoring (optional power quality, fault locator and interconnection protection) | N |
Our product packaging aims to provide functionality and aesthetic appeal. We understand the importance of creating a positive first impression and ensuring the safe delivery of products to customers. The following are the main features of our packaging:
Durable materials: We use high-quality materials that are sturdy and durable, and will not be damaged during transportation. This ensures that our products reach our customers in good condition.
Safe packaging: Our packaging design focuses on a safe outer shell. We use protective layers and liners to prevent any damage to the product caused by external impact or rough handling.
Clear labels: Our packaging includes clear and detailed labels. They provide necessary detailed information, such as product name, quantity, instructions for use, and any necessary warning labels. This helps customers easily identify and understand the product.
Attractive design: We believe that packaging should have visual appeal. Our design team has created a striking modern packaging design that reflects the essence of our brand. This helps our products stand out on store shelves and leave a positive impression.
Shanghai Zhongcheng Fengyuan Industrial Technology Co., Ltd. is an engineering company with a global network of engineering centers, providing high-performance and cost-effective services to global customers. We have established partnerships with most world-renowned brands and can provide components and equipment for the oil and gas, industrial, chemical, and energy industries.
The company's industrial control brand covers major global manufacturers, including but not limited to: Allen Bradley, Siemens, IFM, Beckhoff, Yaskawa, Pepperl+Fuchs, Sick, etc. The products include PLC/DCS modules, touch screens, drive inverters, industrial power supplies, I/O systems, industrial communication, low-voltage control equipment, low-voltage distribution equipment, medium voltage spare parts, protective relays, etc. We have rich industry experience, professional services, and good protective packaging.
We cooperate with various official express delivery companies to export to various parts of the world, such as South Asia, Europe, North America, South America, the Middle East, and Africa. Reducing customer costs helps to create more benefits for each of our customers
Zhongcheng Fengyuan has won the trust of a large number of customers. Our belief is to help our customer factories achieve digitization, intelligence, automation, and create maximum benefits for our customers. Looking forward to working with you! 
1. Question: How is the warranty?
Answer: All products we provide come with a 12 month warranty
2. Question: What about shipping?
Answer: They are in stock and can be shipped immediately. We can arrange shipments of DHL, FedEx, UPS, TNT, EMS at competitive prices, and of course, customers can also use their own freight forwarders.
3. Question: Why did you purchase from us?
Answer: We have over ten years of experience in the field of industrial automation. We have a team composed of qualified engineers and sales personnel, ready to meet customer needs with high-quality products at any time.
4. Question: Are other suppliers offering better prices than you?
Answer: Creating maximum benefits for customers is our belief. If you have a better price, please let us know. We will do our best to meet your price and provide support for you.
5: Q: What payment method do you accept?
Answer: Telegraphic transfer (bank transfer), Western Union transfer, credit card, PayPal, letter of credit, Alipay, cash, custody, etc.
