GENERAL ELECTRIC 745-W2-P5-G5-HI-A-L-R-E-H transformer protection relay
| Product module | 745-W2-P5-G5-HI-A-L-R-E-H |
| Brands | GENERAL ELECTRIC |
| Payment | Paypal/TT |
| Condition | 100% New |
| Weight | 7.54KG |
| Production year | 2024 |
| country of origin | USA |
GE 745-W2-P5-G5-HI-A-L-R-E-H transformer protection relay
Specification
| 745-W2-P5-G5-HI-A-L-R-E-H transformer protection relay |
|
| 745 | 745 Transformer Protection System |
| W2 | Two windings per phase |
| P5 | Winding 1 = 5 A, Winding 2 = 5 A, Winding 3 = 5 A |
| G5 | Winding 1/2 = 5 A, Winding 2/3 = 5 A |
| HI | 90 to 300 V DC; 70 to 265 V AC at 48 to 62 Hz |
| A | Analog inputs/outputs |
| L | Loss of life |
| R | Restricted ground fault |
| E | Enhanced display, larger LCD |
| H | Harsh (chemical) environment conformal coating |
| Dimension | 21.5x23x25cm |
Details
This enhanced model of General Electric Multilin’s 745 series is intended to manage and safeguard transformers, autotransformers, and reactors.
The 745-W2-P5-G5-HI-A-L-R-E-H employs adaptive features to respond to system events in real time. Some of these features include:
1.Dynamic CT Ratio Mismatch Correction
2.Overexcitation Protection
3.Transformer Overload Protection
4.Frequency Rate-of-Change Detection
These features help to extend system life by minimizing strain on transformer elements. Other features such as Hottest Spot
Monitoring can give users insight into potential issues before they worsen.
The relay’s Total Harmonic Distortion (THD) feature is able to calculate the amount of distortion present in system signals and reduce
unnecessary interference. Total Harmonic Distortion is calculated for each winding and then evaluated according to user settings (setpoints).
These calculations adhere to IEEE standards. The range of THD for this part is 0.00 to 99.9% and the accuracy is ±1% of full-scale at 0.5 × CT.
Equipped with a protective conformal coating, 745-W2-P5-G5-HI-A-L-R-E-H is well-suited for harsh operation environments.
Conformal coating is a thin, polymeric layer that guards the relay against environmental threats such as dust, temperature, humidity, abrasion,
and chemicals. This conformal coating is not a sealant, and will therefore allow moisture to dissipate and prevent it from remaining in the board.
This model of the 745 series comes with an enhanced LCD, which is noticeably wider than the base model. The enhanced version of the unit also sees an expansion to the
keypad, considerably increasing the functionality of the relay when manually entering setpoints on the device and for purposes of reviewing system values
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Frequently Asked Questions
| What is the 745-W2-P5-G5-HI-A-L-R-E-H Transformer Protection Relay? |
| The 745-W2-P5-G5-HI-A-L-R-E-H is a transformer protection relay designed to protect power transformers from various faults and abnormal conditions. It monitors transformer parameters and provides protection functions such as differential protection, overcurrent protection, and thermal overload protection. |
| What types of faults does the 745-W2-P5-G5-HI-A-L-R-E-H protect against? |
| This relay protects transformers from a range of faults, including short circuits, overloads, phase imbalances, ground faults, and over-temperature conditions. It helps ensure the reliability and safety of the power transformer by detecting and responding to these faults quickly. |
| How is the 745-W2-P5-G5-HI-A-L-R-E-H installed and configured? |
| The 745-W2-P5-G5-HI-A-L-R-E-H is typically installed in a control panel or switchgear, and is connected to the transformer and other power system components. Configuration is usually done via software, allowing for customization of protection settings, thresholds, and response times according to the specific transformer and system requirements. |
| What are the typical applications of the 745-W2-P5-G5-HI-A-L-R-E-H? |
| This protection relay is typically used in industrial, utility, and commercial settings where transformers play a critical role in power distribution. It is commonly found in substations, power plants, and large industrial facilities, providing reliable protection for transformers in high-voltage and medium-voltage power systems. |
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