Technická knihovna

Not all product demonstrations go as planned. Unforeseen problems can arise, causing the demonstration to go awry. We can either accept this as a failure or use it to create an opportunity. 

Spoleènost Megger vynalezla mìøení izolace pøed zaèátkem 20. století a dále vedla trh s inovacemi a technologickými zlepšeními. Proè jsme tedy vyvinuli 10kV model, když všichni ostatní výrobci konèí na 5 kV? Odpovìdí jsou normy IEEE. Spoleènost Megger vyvinula 10kV zaøízení splòující nová doporuèení pro mìøení daná IEEE. Spoleènost Megger nabízí 10kV mìøièe izolaèního odporu od roku 2001.

High power test and diagnostics combination for medium voltage cables.

Your complete software solution for managing, analysing and logging measurement data and cable data.

REQUIREMENTS FOR SAFE WORK ENVIRONMENT WHEN PERFORMING MV or LV POWER CABLE FAULT LOCATING BY DISCHARGING A HIGH VOLTAGE CAPACITOR.

Since the 1950’s vacuum has been used as insulation media in switchgears. Even though that technology has proven to be very reliable, over time air will leak into the vacuum chamber and degrade the insulation. Also, a good practice is to measure after transport or accidents. The accepted way to test the vacuum integrity has always been through a voltage withstand test. For field tests DC test is preferred due to the weight andsize of the instruments.

The is capable of performing turns ratio tests on any phase shifting transformer by allow-ing for phase shifts to be entered with respect to the secondary winding. But with all of the differ-ent ways phase shift is expressed, how do you know if the entered phase shift value is correct?

Power swing which is principally caused by an oscillation in active and reactive power of transmission line, consequent to an enormous disruption in power system, which if not blocked, could cause wrong operation to the distance relay which may lead to tripping the healthy part of the transmission line. In the absence of power swing function it may result in severe damage to the machines or cascading tripping in the grid resulting in blackouts. To prevent such scenarios, intelligent electronic devices (IEDs) have power swing block (PSB) detection and trip logics incorporated with distance schemes. 

Dokonalá izolace neexistuje, dojde-li u nějakého vodiče ke zvýšení potenciálu nad úroveň uzemnění, bude z tohoto vodiče protékat do uzemnění určitý proud.

Stáhněte si poslední verzi katalogu  Megger a objevte nejnovější přístroje pro oblast testovaní a měření elektrických rozvodů, používaných elektrikáři po celém světě.