Comments on: Lightning Blowing Relay Contact Was Found In V-Guard Voltage Stabilizer https://jestineyong.com/lightning-blowing-relay-contact-was-found-in-v-guard-voltage-stabilizer/ Semiconductors, Test Equipments, Circuit Board Troubleshooting, Electronic Repair Courses and Many More! Mon, 13 May 2024 04:56:53 +0000 hourly 1 https://wordpress.org/?v=5.4.21 By: Parasuraman S https://jestineyong.com/lightning-blowing-relay-contact-was-found-in-v-guard-voltage-stabilizer/comment-page-1/#comment-423575 Mon, 13 May 2024 04:56:53 +0000 https://jestineyong.com/?p=32575#comment-423575 In reply to Imoudu.O.

That is the new relay I fixed in place of the defective one.

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]]> By: Imoudu.O https://jestineyong.com/lightning-blowing-relay-contact-was-found-in-v-guard-voltage-stabilizer/comment-page-1/#comment-423553 Sun, 12 May 2024 20:17:48 +0000 https://jestineyong.com/?p=32575#comment-423553 I repair V.S quite often and i haven't come across this type. What is that black thing that looks like acid-lead battery there?

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]]> By: Parasuraman S https://jestineyong.com/lightning-blowing-relay-contact-was-found-in-v-guard-voltage-stabilizer/comment-page-1/#comment-423486 Sun, 12 May 2024 07:55:27 +0000 https://jestineyong.com/?p=32575#comment-423486 Many thanks, dear friend!

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]]> By: Waleed Rishmawi https://jestineyong.com/lightning-blowing-relay-contact-was-found-in-v-guard-voltage-stabilizer/comment-page-1/#comment-423471 Sun, 12 May 2024 04:53:01 +0000 https://jestineyong.com/?p=32575#comment-423471 That is an ugly looking relay and I am glad you found a replacement for it. Thanks for sharing and be blessed my friend

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]]> By: Parasuraman S https://jestineyong.com/lightning-blowing-relay-contact-was-found-in-v-guard-voltage-stabilizer/comment-page-1/#comment-423458 Sun, 12 May 2024 02:57:17 +0000 https://jestineyong.com/?p=32575#comment-423458 In reply to Yogesh Panchal.

Many thanks, dear Yogesh!

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]]> By: Parasuraman S https://jestineyong.com/lightning-blowing-relay-contact-was-found-in-v-guard-voltage-stabilizer/comment-page-1/#comment-423457 Sun, 12 May 2024 02:56:57 +0000 https://jestineyong.com/?p=32575#comment-423457 In reply to Albert van Bemmelen.

Many thanks for your expert suggestions! These Voltage Stabilizers are made very cheap with minimum components to surive in the market, as there is tough competition with Chinese products flooded around. So, such protectors are not included. But we can find such circuits in UPS.

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]]> By: Yogesh Panchal https://jestineyong.com/lightning-blowing-relay-contact-was-found-in-v-guard-voltage-stabilizer/comment-page-1/#comment-423409 Sat, 11 May 2024 10:03:41 +0000 https://jestineyong.com/?p=32575#comment-423409 Good Job! Sir,

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]]> By: Albert van Bemmelen https://jestineyong.com/lightning-blowing-relay-contact-was-found-in-v-guard-voltage-stabilizer/comment-page-1/#comment-423398 Sat, 11 May 2024 08:19:09 +0000 https://jestineyong.com/?p=32575#comment-423398 I guess that the relays that protect the output voltage from getting out of range are not sufficiently protected from burning in on their contacts although any high voltage lightning surge instantly would kill any semiconductor no doubt.
Which probably could be prevented with a single two-wire snubber circuit consisting out of a resistor and capacitor that are connected in parallel over the switching contacts of the relay. That RC snubber can also be bought as one component with both parts integrated. But if that absorption or anti-jamming circuit already was added to this voltage regulator device it probably would have been destroyer by the lightning too. They often also are used in thyristor and triac switching circuits. And apparently Varistors are inefficient in preventing voltage and current deviations still resulting in relay contact adhesion.

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