Protective Device Models and TV/TA Disconnection Criteria RCS985 TV Disconnection: If the positive sequence voltage is less than 30V, and any phase current is greater than 0.04In, or the negative sequence voltage (3U2) is greater than 8V, a 10-second delay alarm signal is triggered. The signal resets automatically after 10 seconds once the abnormality clears. TA Disconnection: When the negative sequence current (I2) exceeds 0.2A plus 0.25×Imax, a 10-second delay alarm is issued. The signal resets after 10 seconds if the issue resolves. BP2B TV Disconnection: Compares the phase-to-phase voltages of two sets of voltage transformers. If any of the following conditions are met: |UAB-Uab| > 5V, |UBC-Ubc| > 5V, |UCA-Uca| > 5V, or |U1 - U1'| > 3V, a 0.2-second delay alarm is triggered, and the TV switch is initiated. TA Disconnection: Only activates when the differential protection control word is enabled. If the differential current meets the criteria (dI > di_bjzd and dI > kbj × Ires), a 10-second delay alarm is sent without blocking the differential protection. RCS931 TV Disconnection: If the three-phase voltage vector sum is over 8V, a 1.25-second delay PT disconnection signal is sent. If bus PT is used, the same applies if the positive sequence voltage is below 33.3V. For line PT, a 1.25-second delay signal is triggered if any phase flow element operates or the TWJ does not operate. After normal voltage returns, the signal resets after 10 seconds. TA Disconnection: If the self-produced zero-sequence current is less than 75% of the external one, or vice versa, a 200ms delay alarm is issued. If zero-sequence current exists without voltage and at least one phase has no current, a 10-second delay alarm is sent. RSC925 TV Disconnection: If the phase-to-phase current variation and zero-sequence current (3I0 > 0.1*IN) do not operate, and either the three-phase voltage sum is over 12V or the positive sequence voltage is under 33V with any phase current over 0.06In, a 1.25-second delay alarm is triggered. Once voltage recovers, the system resumes after 10 seconds. TA Disconnection: If the self-produced zero-sequence current is over 0.1IN, a 10-second delay alarm is sent. Otherwise, a 10-second delay is also applied. RCS915 TV Disconnection: For single-phase disconnection, if the residual voltage is less than 44V and the bus voltage 3U2 is above 12V, a 1.25-second alarm is issued. For three-phase disconnection, if all phases are below 18V and the bus-tie TA current is over 0.04In, a 1.25-second alarm is triggered. TA Disconnection: If a single-phase current exceeds 0.06In in any branch, or a three-phase balanced current exceeds IDX, a 5-second alarm is issued. If the current exceeds IDXBJ, an alarm is sent for 5 seconds. CSC103 TV Disconnection: Criterion a: |UA+UB+UC| > 7V detects one or two-phase disconnection. Criterion b: If any phase voltage is below 8V and the current is over 0.04In, or the circuit breaker is in the trip position, a PT disconnection is reported. TA Disconnection: If the zero-sequence current is over the setting for 12s and the disconnected phase current is under 0.06In, a CT disconnection alarm is issued and the zero-sequence protection is blocked. CSC125A TV Disconnection: Two criteria are used: |UA+UB+UC| > 7V and |Ua|, |Ub|, |Uc| < 8V with current over 0.04In. An additional condition ensures alarms are only triggered when the circuit breaker is in the trip position. TA Disconnection: If the zero-sequence current is over the set value for 12s and the disconnected phase current is under 0.06In, an alarm is issued. This does not lock the outlet power. CSC300 TV Disconnection: Uses voltage balance to compare two sets of TVs. If one loses voltage, a 10-second delay alarm is triggered. For single-set TVs, three-phase voltages below 20V with current over 0.1A or 0.3A indicates disconnection. A 10-second delay alarm is issued, and protection may be blocked. TA Disconnection: If one phase has no current and there's a differential current, a TA disconnection is detected. Sudden current changes that indicate a drop instead of increase trigger an alarm. CSC150 TV Disconnection: In neutral grounding systems, if three-phase voltage is below 8V and branch currents are non-zero, a 10-second delay alarm is issued. For small current systems, 3U0 > 7V and specific line voltage differences indicate disconnection. TA Disconnection: If the differential current imbalance exceeds thresholds, a CT disconnection is reported. WFB800 TV Disconnection: Voltage balance and single-group TV disconnection criteria are used. If conditions like |UA+UB+UC| > 18V or three-phase voltage < 8V with current > 0.06In are met, a 80ms delay alarm is triggered. Another criterion uses positive sequence voltage < 30V or negative sequence voltage > 8V with a 10s delay. TA Disconnection: If any phase differential current exceeds 0.15In, and at least one phase current is zero or constant, a TA disconnection is reported. WXH801 TV Disconnection: Two criteria: |UA+UB+UC| > 7V for one/two-phase disconnection, and three-phase voltage < 8V with current > 0.04In or all currents < 0.04In. A 1s delay is used for both. TA Disconnection: If zero-sequence current lasts more than 12s and exceeds the setting, an alarm is issued, and protection is locked until the current disappears. WMH800 TV Disconnection: In large ground current systems, if any phase voltage is below the setting or 3U0/3U2 > 7V, a 7s delay alarm is triggered. In small systems, composite voltage components form an OR gate for detection. TA Disconnection: If the differential current exceeds the CT disconnection limit for 7s, it is judged as CT disconnection. BP2B TA Disconnection: If the difference current exceeds a fixed value, a 9s delay alarm is sent, and busbar protection is blocked. It resumes after 0.9s when the loop is normal. PSL600 TV Disconnection: When using bus PT, if the three-phase voltage sum is below 0.5Un, or when using line PT and the switch is not in the trip position, a PT disconnection is reported. A 1.25s delay is used for signaling and protection blocking. TA Disconnection: Zero-sequence difference current is used to detect CT disconnection. If the difference on both sides exceeds a threshold and the largest phase current is below a limit, an alarm is sent. DGT801 TV Disconnection: Based on phase-to-phase voltage comparison between two TVs. If pressure difference is over a set value and no negative sequence voltage is present, it is judged as a dedicated TV disconnection, locking inter-turn protection. TA Disconnection: If one-phase differential action occurs without negative sequence voltage, it is judged as TA disconnection. Current mutation direction is used as a main criterion. What is a Mobile Phone Back Skin?
Mobile Phone Back Stickers,3D Relief Back Sticker,Back Film Cover Sticker,Screen Protector Back Film Cutting Machine Shenzhen TUOLI Electronic Technology Co., Ltd. , https://www.tlhydrogelprotector.com
The Mobile Phone Back Sticker is an interesting way to decorate the phone, which can add style to the mobile phone while also providing a small amount of protection. They are different from Mobile Phone Cases, which usually pay more attention to function than style. The Back Sticker is directly attached to the surface of the phone, which can achieve a more unique appearance than most phone cases.
Sometimes called skin or Mobile Phone Case, the typical mobile phone Back Film is made of vinyl products. The material provides a glossy finish and can use a variety of colors in the design. JJT can provide you with a variety of solid colors or use a variety of different patterns and color combinations of skins. In all cases, the Back Film is close to the phone body and will not interfere with any functions of the phone.
One of the advantages of using decorative skins is that they will not be permanently attached to the phone. This means that you can choose several different Back Skin Sticker and change the appearance of the phone according to the occasion. For example, they can be used to decorate mobile phones during holidays, seasons of the year, or special events such as birthdays, wedding receptions, and any other imaginable occasions.
Whether you want to get gorgeous, high-density, high-quality skin for your smartphone, then you need 3D Relief Back Sticker to fit your phone perfectly. Abandon the bulky Phone Case and wrap the smartphone in a high-quality PVC Back Sticker.
The Back Sticker not only adds texture to your smartphone for a strong anti-skid feel. It also hides the cracks on your back smartphone without having to add a bulky case or pay a huge sum to replace it.
Precise cutting and long-lasting durability: The Back Sticker Cutting Machine can perform precise cutting, is compatible in all situations, and the hole position is accurate, which is very suitable for your equipment.
Zero air bubbles, no residue: The Back Skin has excellent air permeability and a slim appearance, and will not leave any residue after being torn off, so it will not affect the wireless charging function.
Anti-scratch and anti-fingerprint: Mobile Phone Back Wrap uses PVC environmentally friendly materials to protect your phone from daily scratches, dust, scratches and normal wear and tear. Provide a protective back for the phone (including curved edges).